Densified Mixture Design Algorithm Research Articles

High-strength high-performance concrete incorporating different macro fiber types and contents: Engineering and durability performance

ABSTRACT Generating a synergistic response by combining the advantages of different fiber types in concrete is of current scholarly interest. This study investigated the effects of different hooked-end steel fiber (SF) volume fractions up to 1.6% and three macro fiber types including polypropylene (PP), SF, and typical hybrid fibers (HF: 50% SF + 50% PP) at a fixed dosage of 1.6% on properties of high-strength high-performance concrete (HSHPC). A novel densified mixture design algorithm was used to incorporate a high quantity of fly ash and rice husk ash as an eco-binder. Results showed the specimens with added macro SF exhibited improved mechanical strength, dynamic modulus of elasticity and rigidity, and lower drying shrinkage while the ones with added PP exhibited reductions in compressive strength and dynamic modulus. Interestingly, the incorporation of macro fibers, regardless of fiber type and content, reduced electrical resistivity, ultrasonic pulse velocity and increased the total charge passed in the chloride ion penetration test, resulting in likely underestimation of the reinforcement corrosion resistance, especially for SF specimens. The findings also confirm that HF demonstrating synergistic response may be effective and creative in improving most of the concrete characteristics, contributing to the efficient use of HSHPC in real-world structures.

Influence of rice husk ash and hybrid fiber on engineering properties of densified high-performance fiber-reinforced concrete

Conventional concrete significantly affects the environment due to high CO2 emission into the atmosphere during the production process. In order to improve concrete performance and arrest the incidence of global warming, the use of additive materials for cement replacement has been promoted worldwide. This study was designed to investigate the mechanical properties of high-performance fiber-reinforced concrete (HFRC) produced using rice husk ash (RHA) and hybrid fiber (HF) in accordance with the densified mixture design algorithm (DMDA) mix design method. Samples were produced using RHA as a direct replacement for cement at 10%, 20%, and 30%. HF, comprising steel and polypropylene fibers, was added (by volume) to the 20% RHA group mixture to improve the HFRC sample properties. Based on the experimental results, higher RHA contents had a generally negative effect on the fresh properties of the HFRC mixtures. Compressive strength values ranged from 53 to 72 MPa with various RHA and HF content. RHA replacement levels up to 20% had an insignificant effect on the strength development and dynamic modulus of the HFRC samples. However, the addition of HF improved splitting tensile strength, flexural strength, and dynamic modulus remarkably at all curing ages. Furthermore, the 91-day drying shrinkage was in the ranges of 0.032%–0.039% and 0.023%–0.034% using different RHA and HF levels, respectively. Increasing both RHA and HF contents significantly reduced drying shrinkage in the samples. Multivariable regression was also performed, clarifying that all tested results were consistent and had good correlations. The results of this study also provide a potentially effective use for abundantly available industrial waste products such as fly ash (FA) and RHA to promote the production of greener and more sustainable concrete.

Densified mixture design algorithm: A novel mix design concept and its application for green concretes incorporating industrial by‐products

AbstractDespite the fact that densified mixture design algorithm (DMDA) has been identified as a promising tool for green concrete mix design, its use in real practice has still been minimal worldwide. Due to the lack of precise information on DMDA computation in earlier studies, this work proposes DMDA including fly ash and ground granulated blast‐furnace slag as a viable way to improve the long‐term performance of green concrete. To encourage the use of DMDA, this study offers a detailed description of the DMDA mix design, as well as a step‐by‐step standard operating procedure and an empirical example of the computation. Assessments of the long‐term performance of green mixtures (self‐consolidating concrete and high‐performance concrete) and ordinary Portland cement concrete (designed using the conventional method of American Concrete Institute, ACI) were made. Performances of the ACI (O6000 mixture) and DMDA concretes (S6000 and H6000 mixtures) were then compared in terms of compressive strength, elastic modulus, shrinkage, and creep strain. As a result, all of the concrete samples attained the target strength of above 41 MPa (6000 psi) after only 28 days. Moreover, compressive strength, elastic modulus, shrinkage, and creep strain increased significantly in all of the concretes over curing time. Importantly, the experimental results confirmed that both types of DMDA concrete exhibited higher compressive strength and better long‐term performance than the ACI concrete under elastic modulus, creep, and shrinkage aspects.

Mechanical properties of concrete produced with alkali-activated slag-fly ash and recycled concrete aggregate and designed using the densified mixture design algorithm (DMDA) method: Effects of recycled aggregate content and alkaline solution

The purpose of this study was to evaluate the mechanical properties of concrete specimens produced with recycled aggregate (RA) from construction demolition waste (CDW) based on alkaline activated slag-fly ash (AASF). The recycled aggregate concrete mixtures (RAC) were designed using DMDA method, with RA used as a 30%, 40%, and 50% partial replacement for natural aggregate (Category 1) and with Na2O doses of 4%–8% and modulus ratios of 0.6–1.4 (Ms = SiO2/Na2O; Category 2). The results showed that the inclusion of RA negatively affected the mechanical properties of RAC specimens, with recycled coarse aggregate exhibiting less of a negative effect than recycled fine aggregate. The concrete mixtures exhibited mechanical strength values of 20.7–35.9 MPa and UPV values of 3692–4200 m/s at 28 days of curing age. Concrete characteristics were significantly better in the mixtures produced using higher alkaline concentrations than in those produced using lower alkaline concentrations.

Engineering properties and durability of concrete samples designed by densified mixture design algorithm (DMDA) method incorporating steel reducing slag aggregate

This research aimed to examine concrete specimens' mechanical and durability properties that included the steel reducing slag aggregate (SRSA) as a complete replacement for natural fine and coarse aggregate. The concrete samples were designed using the DMDA method with water content controlled around 160 kg/m3 and the water to binder (W/B) ratio at 0.3 and 0.4. The SRSA was used as a total replacement for natural fine aggregate, natural coarse aggregate, etc. The experimental tests including slump, slump flow, fresh unit weight, compressive strength, splitting tensile strength, water absorption and porosity, electrical surface resistivity (ESR), thermal conductivity (TC), drying shrinkage, sulfate attack resistance were used to conduct the engineering properties and durability of concrete samples, while microstructure analysis was observed by using scanning electron microscopy (SEM) micrographs. The experimental results illustrated that using SRSA improved the compressive strength of concrete samples in early and reduced in later age. The incorporating SRSA reduced the mechanical properties and durability of concrete specimens. However, all the concrete exhibited a good corrosion resistance with a high ESR value and stable mass change under sulfate attack solution. Besides, the utilization of fine SRSA showed a better performance than coarse SRSA.

Effects of recycled aggregates on properties of plastic concrete using densified mixture design algorithm (DMDA)

This study explored the effects of the recycled fine and coarse aggregates (RFA and RCA) on the properties of the plastic concrete with mixing proportions designed by densified mixture design algorithm (DMDA). The recycled aggregates partially replaced the natural aggregates by 10–50% volume and the fly ash was used to minimize the voids. The results showed that, as the replacement ratio of RFA was increased from 10% to 50%, the workability, bleeding and water permeability were increased, but the strength was decreased. With RCA, the workability, bleeding, and water permeability were increased, but the strength were decreased and slightly recovered at an optimal replacement ratio of 30% and 40%. All the changed properties were attributed to the packing effect more than the water absorption and the hydration. The DMDA helps to produce qualified plastic concrete with high consistency, low strength, and low permeability in the presence of recycled aggregates.

Waste incineration bottom ash as a fine aggregate in mortar: An assessment of engineering properties, durability, and microstructure

This study was developed to investigate the potential re-utilization of waste incineration bottom ash (IBA) sourced from Southern Vietnam as a replacement for natural crushed sand in cement-based mortars. In this study, all of the mortar mixtures were designed using the novel densified mixture design algorithm with a detailed step-by-step standard operating procedure and an empirical example of the calculation. Changes in the engineering properties (i.e., flowability, fresh unit weight, compressive strength, bending strength, and drying shrinkage), durability (i.e., porosity, water absorption, chloride ion penetration, ultrasonic pulse velocity, and resistance to sulfate attack), and microstructure of the mortars were systematically evaluated using mortar specimens produced with five different IBA replacement levels of 0, 25, 50, 75, and 100% (by volume). Moreover, the correlations among these several mortar properties were established and discussed. The experimental results indicate that the IBA replacement level significantly affects the properties of mortars in both fresh and hardened stages. Increasing the IBA replacement level was found to increase porosity, water absorption, and drying shrinkage and to reduce compressive and bending strengths in the mortar specimens. Moreover, increasing the IBA replacement level reduced resistance to sulfate attack. However, all of the proposed mortars exhibited very good chloride penetration resistance and good quality, with chloride ion penetration and ultrasonic pulse velocity values ranging from 355 to 638 Coulombs and 3483–4416 m/s, respectively, at 56 days of curing age.

Recycled Coarse Aggregate from Concrete Waste Using DMDA for Concrete

This study investigates the effect of the replacement of recycled concrete as coarse aggregates using the Densified Mixture Design Algorithm Method (DMDA) in unconfined concrete behavior. DMDA was applied to produce concrete with the least void. Compressive strength, flexural strength and split tensile strength tests were conducted on 7-, 14-, 28- and 56-day old specimens. Compressive strength test results showed that specimens with 20, 30, and 40% RCA replacements at 56 days are relatively lower compared to the control and with 10% RCA replacement specimens. The compressive strengths of the specimens with RCA replacements decreased as the amount of RCA increased. However, the 10% replacement specimens showed promising performance with an average strength of 3275 psi at 56 days with an 11.2% difference in compressive strength with the control with 0% replacement. A significant increase in compressive strengths between the 28- and 56-day specimens for all specimens was observed and accounted due to the pozzolanic activity of the type C fly ash used as filler. For flexural and splitting tensile strength, results showed that specimens with 40% replacement showed best performance with a 9.87% difference and roughly 1% greater with the control in terms of its flexural and splitting tensile strength, respectively.

Effect of paste content on long-term strength and durability performance of green mortars

This study uses densified mixture design algorithm (DMDA) to design the mixture proportions green mortars incorporating fly ash and ground granulated blast furnace slag (GGBFS). Three green mortar mixtures with various paste contents were designed using the DMDA method while a control cement-based mortar mixture was designed using the conventional method for comparison. The effect of different paste contents (n = 1.1, 1.3, and 1.5) on the changes of porosity, thermal conductivity, compressive strength, chloride ion penetration, resistance to sulfate attack, and ultrasonic pulse velocity (UPV) of both the green and control mortars was studied. The procedures of DMDA mix design for green mortar mixtures were also presented in this study. Test results reveal that all three green mixtures show a better performance than the control mixture, especially for long-term properties. On the other hand, increasing paste content increased porosity and compressive strength, however, it reduced thermal conductivity and UPV of the green mortars. All of the green mortars exhibited good performance with low porosity and compressive strength values of above 40 MPa after 28 days of curing. Moreover, the green mortars also demonstrated excellent ability to resist chloride (with RCPT values significantly lower than the threshold of 1000 coulombs) and sulfate attacks. As a result, the quality of these mortars was classified as very good level with UPV values of above 4000 m/s. This study proves the effectiveness of using the DMDA method to design the green mortar mixtures in the combination of using fly ash and GGBFS.

Turning incinerator waste fly ash into interlocking concrete bricks for sustainable development

The reuse of industrial waste plays a vital role in sustainable development in recent years. In this study, the potential of using the densified mixture design algorithm (DMDA) to utilize waste incineration fly ash (IFA) as a cementitious replacement in interlocking concrete brick (ICB) was investigated. The differences in dimensions, visible defects, engineering properties, and long-term performance of ICB samples produced using different IFA replacement ratios (0%, 15%, 30%, 45%, and 60%) were examined. The results indicate that the IFA replacement level affects ICB properties significantly with increasing levels of IFA replacement associated with decreasing compressive strength, abrasion resistance, bending strength, and bulk density whereas increasing water absorption and void volume. The results of a scanning electron micrograph analysis indicate that higher IFA content is associated with a progressively less-homogeneous microstructure. The effectiveness of the DMDA algorithm was clearly verified, as all of the samples were found to comply fully with relevant Vietnamese standards. The relationships among the tested properties were then established and discussed. The findings of this study prove a promising approach for the combination DMDA algorithm and IFA materials in the production of interlocking bricks adapting sustainable development.

Effect of lubricating paste content on the engineering properties and microstructure of green mortars designed by densified mixture design algorithm

Mortar is one of the building materials that is widely used in most construction activities. So far, various methods have been used for designing the mixture proportions of mortar, and different ideas have been considered to improve the mortar’s quality. In this study, a novel densified mixture design algorithm (DMDA) developed by Hwang’s research group at the National Taiwan University of Science and Technology is applied for the mix design of the green mortar. The major concern of DMDA is to minimize the void volume of the aggregate system to obtain the maximum density of mortar with less water and less cement content, thus increasing the mechanical strength and durability performance of the mortar. In addition, the incorporation of both fly ash and ground granulated blast furnace slag in the DMDA method not only enhances the mortar’s quality but also provides a good solution for industrial waste treatment toward a cleaner environment and sustainable development. Another aim of this study is to investigate the changes in engineering properties and microstructure of the green mortars prepared with various lubricating paste contents (n). For this purpose, the green mortar samples were prepared with three different paste contents (n = 1.1, 1.3, and 1.5) and a fixed water/binder ratio of 0.4 was fixed for these mixtures. A reference mix designed by the conventional method was also included for comparison purpose. In the fresh stage, the flow diameter of all fresh mortar mixtures was adjusted in the range of 180 ± 5 mm by using various superplasticizer dosages and the fresh unit weight of these mixtures was also checked. In the hardened stage, the mortar samples were subjected to various tests including flexural strength, compressive strength, water absorption, and drying shrinkage. Moreover, a scanning electron microscopy technique was also used to observe the microstructure of the mortars. The experimental results show that increasing the paste content resulted in an increase in flexural strength, compressive strength, and drying shrinkage of the green mortars, meanwhile, a reduction in their fresh unit weight was found. Besides, all of the mortar samples exhibited a denser microstructure with low water absorption rates. A maximum compressive strength value of about 53 MPa could be achieved for the green mortar sample at 28 days with n = 1.5. It could also be observed from the results that all of the green mortars exhibited better performance than the reference mortar. The results of this study further demonstrated the effectiveness of using DMDA for the mix design of green mortars for sustainable construction.

Influence of fine sediments on rheology properties of self-compacting concretes

Sediments from dredging works are increasingly used in the building and construction industry. One of the major difficulties of sediment valorization resides notably in the very heterogeneous composition of its fine particles. This paper focused on the rheological impacts caused by the use of uncontaminated raw marine sediment (RS) in Self-Compacting Concrete (SCC). The Densified Mixture Design Algorithm (DMDA) was used to optimize RS as a raw material in the granular structure of the SCC. The AFREM grout method was used to determine the saturation dose of the superplasticizer. The rheological tests were carried out to assess the influence of fine RS particles on the workability of SCC. The stability of SCC was found to be correlated with the high percentage of fine particles less than 125 μm present in the RS. The fine nature of clays and the organic matter caused the increase in yield stress and plastic viscosity. The rheological tests were carried out to assess the influence of fine RS particles on the workability of SCC. The stability of SCC was found to be correlated with the high percentage of fine particles less than 125 μm present in the RS.

Environmental assessment, mechanical behavior, and chemical properties of self-compacting mortars (SCMs) with harbor dredged sediments to be used in construction.

Environmental and ecological issues have led to the development of new sustainable channels for the recovery of dredged sediments. One of the major difficulties of sediment valorization lies in particular in its very heterogeneous composition. For example, the presences of heavy metals and organic matter have a significant influence on the environmental impact of materials formulated with sediment. Some heavy metals such as antimony, mercury, lead, and cadmium in high concentrations are dangerous to the body. Trace metals trapped in sediments are transformed through complex biogeochemical processes. They subsequently associate with organic matter to form clay-humic groups that define the degree of sediment pollution. The Harbour Dredging Sediments (HDSs) used were classified as non-hazardous waste in accordance with Directive 12/12/14/EC. The purpose of this study is to evaluate the environmental impact of the use of HDS from active lagoon in the formulation of self-compacting concrete (SCC) with the objective of incorporating a high sediment content, obtaining materials with a low environmental impact and ensuring compressive strength of a C25/30 class concrete. Three HDSs are being studied that have a significant impact their difference by their fines content at 125 μm. Sediments recovered from the active lagooning process have not undergone any physical, chemical, or thermal treatment. The DMDA (Densified Mixture Design Algorithm) method is used to optimize the composition of "sediment" SSCs. The communication focuses on mortars equivalent to these "sediment" SCCs (SCMs). Sediment represents about 20% of the granular composition with a sediment-to-cement ratio of 80%. Compressive strengths are greater than 25 MPa and tensile strengths are in the range of 3 to 8 MPa at 28 days of curing. From an environmental point of view, all heavy metals are stabilized except nickel. In particular, there has been a considerable decrease in the levels of sulfate, total organic carbon, and chloride. The different SCMs are classified as inert, clinker hydration produces hydrates that capture and stabilize heavy metals in the cementitious matrix. The results obtained show that HDSs could be used as a secondary raw material in the formulation of self-compacting concretes.

Application of self-produced artificial sand in the production of green mortar

Due to the large disposal of locally industrial wastes and the shortage of natural resources, turning industrial by-products into green artificial materials has been attracting many researchers in the world. Following this trend, this study evaluated the potential application of self-produced artificial sand (AS) in the production of green mortar. The AS was produced by the alkali-activated method using a mixture of 36.4% fly ash, 36.4% slag, 3.5% 10M NaOH solution, 11% Na2SiO3 solution, and 12.7% water. The mortar mixtures were designed based on the densified mixture design algorithm with the incorporation of the AS as the substitution of natural sand (NS) by 0 – 100 wt.% (interval of 20%). The engineering properties of the mortar samples in both fresh and hardened states were evaluated through the tests of workability, compressive strength (CS), water absorption (WA), and shrinkage/ expansion. The experimental results showed that the mortar sample incorporating 20% of AS to replace NS performed superior engineering properties in comparison to other samples. Further increasing the AS content generally caused a negative impact on the mortar’s performance. Increasing AS content beyond 20% systematically decreased the CS while both WA and expansion were increased noticeably. However, the properties of the green mortar produced for this study satisfied all of the requirements of the official Vietnamese standards. Thus, the research results further confirmed a great potential in producing green mortar using AS to either partially or fully replacement of NS. In addition, the use of AS greatly contributes to not only saving natural resources but also limiting the negative effects on the environment due to the exploitation and use of naturally sourced materials.

Mechanical and durability properties of recycled aggregate concrete produced from recycled and natural aggregate blended based on the Densified Mixture Design Algorithm method

The aim of this study was to reuse recycled concrete aggregates for concrete production by using the Densified Mixture Design Algorithm (DMDA) method for blended aggregates and mixing design based on the evaluation of characteristics of recycled aggregate concrete (RAC). Recycled coarse aggregate (RCA) was used to replace 30%, 40%, and 50% of the natural coarse aggregate (NCA), respectively, by volume in the samples, and the fine aggregate was a combination of 70% natural fine aggregate (NFA) and 30% recycled fine aggregate (RFA) by volume. A series of tests, including compressive strength, splitting tensile strength, ultrasonic pulse velocity (UPV), electrical surface resistivity (ESR), thermal conductivity (TC), water absorption, and the rapid chloride penetration test (RCPT) were conducted in accordance with the relevant standards. The results illustrated that blending aggregates following to DMDA method suggested an optimum proportion of RCA level which exhibited with highest volume of aggregate per unit volume of combination of RCA and NCA. The results revealed 40% RCA content as the optimum replacement level. Furthermore, the 40% RCA concrete mix exhibited good hardening properties in terms of being only slightly below the 30% RCA mix and significantly higher than the 50% RCA mix. All of the RAC mixtures designed by DMDA method with low cement consumption exhibited good strength development and good durability through 120 days of curing.

HPC produced with CDW as a partial replacement for fine and coarse aggregates using the Densified Mixture Design Algorithm (DMDA) method: Mechanical properties and stability in development

This study was designed to examine the mechanical properties and durability of high-performance recycled aggregate concrete (HPRAC) containing high percentages of construction and demolition waste (CDW). In the samples, natural coarse aggregate was replaced with recycled coarse aggregate at respective ratios of 30%, 40%, and 50%, and natural fine aggregate was replaced with recycled fine aggregate at respective ratios of 40% and 50%. The concrete mixtures were designed using the Densified Mixture Design Algorithm (DMDA) method with low cement content and water binder (w/b) ratios of 0.3, 0.4, and 0.5. Concrete samples were tested for compressive strength, splitting tensile strength, ultrasonic pulse velocity (UPV), electrical surface resistivity (ESR), thermal conductivity (TC), water absorption (WA), and rapid chloride penetration and were analyzed using scanning electron microscope (SEM) micrographs for microstructure. The results support a negative relationship in concrete between CDW content and strength and durability development as well as between the w/b ratio and mechanical properties and durability. However, all of the HPRAC specimens designed in this study using the DMDA method achieved a high strength range, good durability, and stability over curing time.

Study on the Properties of SCLAC Using Infrared Thermography and Ultrasonic Pulse Velocity

Abstract A densified mixture design algorithm (DMDA) was employed to produce self-consolidating lightweight aggregate concrete (SCLAC). Lightweight aggregates with different particle densities were evaluated, and the batched water density and water-to-binder (w/b) ratio were varied. The results indicated that the properties of SCLAC mixed according to the DMDA were better than those according to the American Concrete Institute (ACI). Specifically, the slump and slump flow were greater than 250 mm and 500 mm, respectively. For instance, the strength of the material developed quicker; after 7 days of aging, the compressive strength of the specimen was 72 % of the strength obtained after 28 days. Under identical conditions, the compressive strength of SCLAC showed the best development when the w/b ratio was equal to 0.32 (45 MPa after 91 days). When the lightweight aggregate concrete was mixed according to the ACI mixture’s algorithm, the electrical resistivity of the SCLAC reached 53 KΩ-cm and improved to 40 KΩ-cm. The durability of material synthesized according to the DMDA was better than that of the traditional ACI mixture design. The degree of aggregate floating affected the location of the particles and the uniformity of concrete by approximately 20–40 %. Moreover, the results revealed that a low w/b ratio or mixing water density enhanced the development of the pulse ultrasonic velocity. The ability of aggregates with different specific gravities to transmit heat was determined by applying an infrared thermal method, and the results suggested that specimens with different particle densities (800 and 1,300 kg/m3) presented significant differences in temperature variations. Lastly, scanning electron microscopy showed that hydration continued as the age of the material increased, which increased the compressive strength and compactness. In conclusion, a concrete mix designed with DMDA has higher workability and reaches design strength faster.

Recycling of Waste Limestone as Fine Aggregate for Conventional and Green Concretes

This paper presents the results of the experimental works to investigate the use of waste limestone from water treatment industry as fine aggregate in green concrete. Two concrete mixtures with a constant water-to-binder ratio of 0.3 were prepared for this investigation, in which, the normal concrete mixture was designed following the guidelines of ACI 211 standard, while the green concrete mixture was designed using densified mixture design algorithm (DMDA) technology. For comparison, both types of concrete samples were subjected to the same test program, including fresh properties, compressive strength, strength efficiency of cement, drying shrinkage, electrical surface resistivity, ultrasonic pulse velocity, and thermal conductivity. Test results indicate that both concrete mixtures showed the excellent workability due to the round-shape of waste limestone aggregate and the use of superplasticizer. In addition, the green concrete mixture exhibited a better performance in terms of engineering properties and durability in comparison with the normal concrete mixture. The results of the present study further support the recycling and reuse of waste limestone as fine aggregate in the production of green concrete.

An Assessment of Characteristics of Densified High-Performance Concrete Incorporating High Volume Fly Ash

The present study evaluates the mechanical-microstructural characteristics of the densified high-performance concrete (HPC) incorporating high volume fly ash (FA). The densified mixture design algorithm (DMDA) technology was applied to design the concrete proportions. The effects of various FA contents on both fresh and hardened concrete were investigated. A scanning electron microscope (SEM) was used to observe the microstructure of the concrete samples. The effectiveness of using DMDA in mix deign was also discussed in this study. As the experimental results, the FA content was found to affect the concrete properties significantly. The maximum compressive strength value of 65.1 MPa was obtained at the concrete samples containing 40% FA. Additionally, the 40% FA samples exhibited a denser microstructure as compared to the others. Generally, all of the tested concrete samples exhibited good performance in terms of workability, strength development, water absorption, and porosity. The results of this study further show the effectiveness of using DMDA technology in proportioning of the concrete mixture.

Use of DMDA method for production of heavyweight concrete

Waste materials are defined as all unwanted substances from manufacturing processes, including mining, industry, agriculture and others. One of the most commonly used waste product in concrete manufacturing is Fly Ash (FA). Studies have shown that the content of Fly Ash increases the workability of concrete, being useful in production of Self-Consolidating Concretes (SCC). One of the designing methods involving high amounts of fly ash is based on the Densified Mixture Design Algorithm (DMDA). This article attempts to work out HWSCC manufacturing method using the DMDA method with the use of barite and magnetite aggregates. The study integrates six concrete mixes. Concrete strength was tested on 10x10x10 cm samples after 3,7 and 28 days. The rheological properties were tested with Slump Test to find out if the mixes exhibit self-consolidating properties. Concretes with magnetite aggregate exhibit higher strength than concretes with barite aggregate. The study has shown that the DMDA method, designed to produce durable, low-cement concrete may not be applicable in the case of crushed aggregates. The study has shown that the method allows to decrease the cement amount and re-place it with pozzolan waste product to acquire concretes with similar properties to the ones acquired using different methods.