Properties Of Self-consolidating Concrete Research Articles

Synergistic effects of nano and micro silica on fresh and hardened properties of self-consolidating concrete

The escalating demand for methods to diminish cement usage without compromising the strength and durability of concrete mixtures has led to an intensified exploration of alternative mixture ingredients. Nano silica has emerged as a prominent supplementary cementitious material, recognized for its capability to partially substitute cement. Despite this potential, there was a gap in the literature on the effects of nano silica on the concrete’s fresh and hardened properties, particularly when used in conjunction with silica fume. This gap motivated the current investigation, aiming to capture and compare the effects of incrementally substituting silica fume with nano silica in self-consolidating concrete (SCC). For this purpose, four nano silica dosages—1%, 2%, 3%, and 5%— were considered as replacements for silica fume. A range of experiments, including slump flow, T50 time, and L-box tests, were conducted to assess the workability of the developed SCC mixtures. Subsequent analyses focused on key mechanical attributes, including the static modulus of elasticity, compressive strength, and tensile strength. The research further encompassed water absorption, penetration depth, and electrical resistivity evaluations to understand the durability characteristics of the developed mixtures. The scanning electron microscopy (SEM) analyses complemented these tests, offering a microstructural perspective to further explain the outcomes. This investigation’s findings offer novel insights into leveraging nano silica’s distinctive properties to achieve the desired SCC properties while reducing the environmental impact of this class of mixtures.

Hardened property changes due to the pumping process of self-consolidating concrete

Pumping of self-consolidating concrete (SCC) is a vital construction technique. Curiosities are aroused by the effect of this intense physical process on the hardened properties of SCC. To examine this issue, a total of seven SCC mixtures are pumped at constant flow rates in pipelines with lengths of 324, 600, and 912 m. Parameters related to the hydration stages, air-void system, compressive strength, elastic modulus, and shrinkage at early ages are tested on specimens made of concrete before and after pumping. Results of tested samples find that the spacing factor grows, but the specific surface lessens after pumping. Also, in most cases, the compressive strength and elastic modulus decrease due to the pumping. The variations of these two factors are linearly related to the pumping distance in most cases. Additionally, the variations in the early age of shrinkage cracking show a dependency on the concrete compositions, temperature, and pumping characteristics.

Investigation on Mechanical Properties of Self-Consolidating Concrete containing Slag Aggregate

This paper presents the investigation results on self-consolidating concrete (SCC) produced with slag aggregate (SA). The characteristics of materials, sieve distribution of aggregates, design of self-consolidating concrete mixture and its fresh concrete properties test such as slump flow test, V-funnel, U-funnel and L-box are analyzed. The mechanical properties of SCC are with two different grades slag aggregate is tested for compressive strength (f’c), split tensile strength (fst), young’s modulus (Ec) and durability test. The investigation result on concrete mechanical properties shows that mix with larger aggregate exhibits higher values than the companion mix with smaller aggregate. Although it exhibits fairly optimum strength characteristics with slag aggregate substitution but the higher percentage of replacement affects the durability properties. This study leaves a positive way of application of slag aggregate in concrete.

Characterizations of self-consolidating concrete (SCC) from a physicalmechanical perspective with various additions

Self-consolidating concretes (SCC) are special concretes that have the particularity of being very fluid and have been developed over the past thirty years. They are still qualified today as "new concretes" because their use remains modest, although they have strong development potential. The specificity of SCC compared to ordinary vibrated concrete (OC) lies in the fact that it is extremely fluid and does not require vibration to be implemented. Compacting under the effect of their own weight, they can be poured in areas with a high density of reinforcement. For the formulation of self-consolidating concretes, a large volume of mineral addition is necessary so as to reduce the quantity of cement induced by the increase in the volume of paste necessary to allow the flow of the concrete. The main objective of this work was to determine the effect of different cement additions (Filler limestone (Fc), crushed dune sand (Sd), and silica fume (Fs)) by partial substitution of a certain quantity of Portland cement on the physical-mechanical properties of SCC using the capillary absorption test. The results obtained demonstrate that all self-consolidating concretes give interesting results in terms of compressive strength and water absorption.

Strength Prediction of Self‐Consolidating Concrete Containing Steel Fibre with Different Fibre Aspect Ratio

The present study presents the effects of steel fibre aspect ratio on the fresh and strength properties of self‐consolidating concrete (SCC). Steel fibre having three different aspect ratios (50, 65 and 80) with the inclusion rate of 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% was considered, and the effects of aspect ratio and the fibre inclusion rate on the fresh and strength properties of SCC were investigated. Central composite design (CCD) of RSM modeling was considered to propose a regression model to predict the 28‐day compressive strength of SCC and steel fibre‐reinforced SCC (SFSCC) incorporating different supplementary cementitious materials (SCMs). 94 data sets retrieved from various literatures and the experimental data set (SCC and SFSCC) of this present study have been used to develop the regression model. Further, cement content, powder content, water to binder ratio, and coarse aggregate to fine aggregate ratio were considered as basic variables to propose the model, and their influence on the strength properties of SCC was prioritized using analysis of variance (ANOVA) and Pareto chart. The findings of regression model have been compared with the results of 94 data sets, and the experimental data set of this present study and the comparisons confirm that the proposed regression model are very realistic and precise to predict the compressive strength of SCC and SFSCC with different aspect ratio.

Rheology and mechanical performance of self-consolidating hybrid-geopolymer concrete as a sustainable construction material

This investigation aimed to develop a new alkali-activated-based self-consolidating concrete (SCC) as a sustainable construction material. The rheological and hardened properties of hybrid matrix-based SCC (H-SCC) were assessed and discussed. The hybrid matrices were proportioned with optimum NaOH-activated fly ash and glass powder used as partial replacement of cement. The obtained results showed that the investigated hybrid SCC mixtures exhibited good flowability and passing ability. Furthermore, the H-SCC mixtures exhibited good static stability and low segregation. Although the hybrid SCC mixtures developed lower compressive strength than the reference SCC mixture, the obtained strength values were within the strength requirements of structural SCC applications. Besides, the heat curing at 45 °C was not efficient to improve the compressive strength compared to the humid curing. The investigated hybrid SCC mixtures exhibited relatively good durability performance reflected by their low chloride ion penetration and good freeze–thaw resistance.

Utilizing Artificial Intelligence to Predict the Superplasticizer Demand of Self-Consolidating Concrete Incorporating Pumice, Slag, and Fly Ash Powders.

Self-consolidating concrete (SCC) is a well-known type of concrete, which has been employed in different structural applications due to providing desirable properties. Different studies have been performed to obtain a sustainable mix design and enhance the fresh properties of SCC. In this study, an adaptive neuro-fuzzy inference system (ANFIS) algorithm is developed to predict the superplasticizer (SP) demand and select the most significant parameter of the fresh properties of optimum mix design. For this purpose, a comprehensive database consisting of verified test results of SCC incorporating cement replacement powders including pumice, slag, and fly ash (FA) has been employed. In this regard, at first, fresh properties tests including the J-ring, V-funnel, U-box, and different time interval slump values were considered to collect the datasets. At the second stage, five models of ANFIS were adjusted and the most precise method for predicting the SP demand was identified. The correlation coefficient (R2), Pearson’s correlation coefficient (r), Nash–Sutcliffe efficiency (NSE), root mean square error (RMSE), mean absolute error (MAE), and Wilmot’s index of agreement (WI) were used as the measures of precision. Later, the most effective parameters on the prediction of SP demand were evaluated by the developed ANFIS. Based on the analytical results, the employed algorithm was successfully able to predict the SP demand of SCC with high accuracy. Finally, it was deduced that the V-funnel test is the most reliable method for estimating the SP demand value and a significant parameter for SCC mix design as it led to the lowest training root mean square error (RMSE) compared to other non-destructive testing methods.

New diphasic insight into the restricted flowability and granular blocking of self-consolidating concrete: Effect of morphological characteristics of coarse aggregate on passing ability of SCC

Self-consolidating concrete (SCC) was simulated as a diphasic suspension. The passing ability of SCC was characterized in terms of restricted flowability and granular blocking due to its non-Newtonian behavior and multiphasic nature. New heterogeneity indices were then defined to evaluate the granular blocking-induced variations of relative solid-packing fraction (φ/φmax) of coarse aggregate (>1.25 mm) and, consequently, the rheological properties of SCC in the J-Ring and L-Box set-ups.In total, 30 low- and normal-paste SCC mixtures and their corresponding fine mortar portions (<1.25 mm) were investigated in this study. The passing ability of the investigated SCC mixtures were found in good agreements with the visco-elastoplastic properties and excess volume of fine mortars, as well as the morphological characteristics of coarse aggregate. According to the established correlations, the most effective morphological characteristics and rheological parameters on passing ability of SCC include the mean diameter and roughness of coarse aggregate, as well as the plastic viscosity and yield stress of fine mortar, respectively. On the other hand, a comparative study on the passing ability of SCC in different set-ups revealed that low- and normal-paste SCC mixtures exhibited higher granular blocking indices in the L-Box and J-Ring set-ups, respectively. Furthermore, the robustness and ANOVA analyses showed that optimizing the paste volume, φ/φmax, and morphological characteristics of coarse aggregate is more effective to enhance the passing ability of SCC than adjusting the water-to-binder ratios and high-range water-reducer (HRWR) dosages.

Models to predict the mechanical properties of blended SCC containing recycled steel slag and crushed granite stone as coarse aggregate

The present study aims at developing models to predict the various mechanical properties of ternary blended (ground granulated blast furnace slag (GBFS) + microsilica) self-consolidating concretes (SCCs) made with crushed granite stone (CGS) and recycled steel slag (RSS) as coarse aggregate. Ternary blended SCCs were produced in two batches. The first batch contains RSS as coarse aggregate, whereas the second contains CGS as coarse aggregate. The samples were subjected to compression, split tension, flexural, modulus of elasticity, and rebar pull-off tests. Experimental results imply that the mechanical properties of RSS aggregate SCCs were 10 to 21% lower than the CGS aggregate SCCs. Regression analysis was performed with the recorded results, and models were proposed to correlate the various hardened properties of the SCCs with a high correlation coefficient (R2 ≥ 0.94).

Durability and transport properties of SCC incorporating dredged sediments

The use of sediments as supplementary cementitious material is increasing, but very limited information on their effect on durability are available. The aim of this study is to evaluate the durability and transport properties of self-consolidating concrete (SCC) incorporating treated marine sediments (TMS) dredged from Dunkirk harbor. Three SCC mixtures made with 0% (SCC-R), 10% (SCC-1), and 20% (SCC-2) sediments as partial substitution of cement weight were investigated. The mixture proportions were optimized to provide adequate self-consolidating characteristics, including high filling and passing abilities, as well as adequate stability. The optimized SCC mixtures exhibited comparable hardened and microstructural properties at 91 days of age, including compressive strength of 66 ± 1 MPa, splitting tensile strength of 6 ± 0.3 MPa, and total porosity of 9 ± 0.4%. The obtained test results revealed that the incorporation of TMS reduced the critical pore volume (<20 nm) due to their pozzolanic reaction and filling ability. Despite this reduction, increasing TMS content increased permeability and diffusion (e.g., carbonation). Indeed, SCC-1 and SCC-2 showed higher sorptivity of 7.5% and 19.8%, respectively, than that of SCC-R (2.81 E-3 mm3/mm2.s½). However, SCC-1 showed comparable durability performance to the reference mixture, including chloride penetrability, electrical resistivity, drying shrinkage, external sulfate attack, and alkali-silica. Meanwhile, the use of 20% TMS negatively influenced the chloride penetrability, external sulfate attack, and carbonation velocity. This substitution rate can be considered without mitigating durability of reinforced concrete in moderate exposure conditions.

Rheo-morphological investigation of Reynolds dilatancy and its effect on pumpability of self-consolidating concrete

Reynolds dilatancy is one of the main mechanisms responsible for the lubrication layer (LL) formation during pumping of self-consolidating concrete (SCC). In this study, the effect of morphological characteristics of coarse aggregate on Reynolds dilatancy of 30 different SCC mixtures was investigated. The Reynolds dilatancy measurements were carried out using a coaxial-cylinders tribometer. New methodology to evaluate the morphology of coarse aggregate using 3D image analysis was also proposed. The Reynolds dilatancy values of the investigated SCC mixture were well correlated to both the morphological characteristics of coarse aggregate (>1.25 mm) and visco-elastoplastic properties of the suspending fine mortar (<1.25 mm). The established correlations revealed that higher 3D surface area and roughness, as well as lower mean diameter and elongation of coarse aggregate can lead to higher Reynolds dilatancy.Moreover, the thickness, composition and rheological properties of the LL, as well as the rheological properties of the investigated SCC mixtures were successfully evaluated using the Reynolds dilatancy and morphological measurements. The pumpability of the investigated SCC mixtures were then predicted using the estimated rheological properties of the investigated mixtures and their corresponding LL. The results showed that higher Reynold dilatancy and lower rheological properties of SCC can decrease the pressure loss and facilitate the pumping process. Moreover, the pumpability of SCC was found to be more controlled by the volume of cement paste, concentration, and packing density of coarse aggregate.

Proposing a New Apparatus to Assess the Properties of Self-Consolidating Concrete

Abstract Developing a quick and low-disturbance method that allows quantification of the fresh properties of self-consolidating concrete (SCC), such as filling ability, passing ability, and segregation resistance, is in high demand. Some apparatuses that measure only one property of SCC have been developed so far, so there is no apparatus for simultaneous measurement of all SCC properties. In the present article, a new apparatus that can rapidly assess the aforementioned properties at the same time was proposed. In order to evaluate the performance of the new apparatus, seven different SCC mixtures were prepared, and their fresh properties were experimentally analyzed. One common test for each property of SCC was also performed to verify the results. The results of this article revealed that the results obtained of fresh properties by the new apparatus were in a good agreement with those measured by the traditional methods. As a result, the proposed apparatus may be an appropriate substitution for determination of all SCC properties.

Influence of waste glass aggregates on the rheological properties of self-consolidated concrete

ABSTRACT Implementation of self-consolidating concrete (SCC) leads to the evaluation of more attractive, quality-controlled concrete with improved workability in the construction sector. The aim of the paper involves the determination of the rheological properties of SCC using waste glass aggregate, which affects the concrete’s rheological behaviour. In this research, the conventional coarse aggregate was substituted by the waste glass aggregate (WGA), at 10%, 20% and 30%, respectively. The consequence of adding waste glass in fresh concrete was inspected by several tests such as density, slump flow, J-ring, L-box and V-funnel test. These properties were then compared to the corresponding properties of normal-weight concrete. Test results specify that the WGA amplified the slump value of SCC thus indicates the improved workability. The decreasing density of the SCC leads it to the lightweight concrete. Subsequently, the SCC concrete shows relatively reduction in the passing ability with the addition of waste glass due to the angular shape of the glass bits. Hence, the study concludes that all of the rheological properties of self-compacting glass concrete (SCGC) made of WGA showed an impressing enhancement in the result, in comparison with the conventional SCC.

CONCRETOS AUTOADENSÁVEIS E CONVENCIONAIS: ANÁLISE DAS PROPRIEDADES EM ESTADO FRESCO E ENDURECIDO

RESUMO: Os concretos autoadensáveis destacam-se por suas características essenciais: capacidade de preenchimento de fôrmas, habilidade passante e resistência à segregação, permitindo assim o aumento da qualidade de peças estruturais de concreto, assim como a otimização de sua execução. Contudo, para obtenção de suas características essenciais, um fator é imprescindível trata da utilização de materiais finos, com o objetivo de controlar os efeitos negativos de segregação e exsudação à que o concreto fresco é suscetível a apresentar. Neste contexto, o presente trabalho tem por objetivo comparar as propriedades no estado fresco e endurecido de um concreto autoadensável, utilizando cinza volante como material fino, com um concreto convencional, produzidos com materiais disponíveis na região de Toledo-PR. Os resultados demonstraram que o concreto autoadensável apresentou melhor desempenho quanto às propriedades mecânicas em relação ao concreto convencional. As imagens obtidas por meio da microscopia eletrônica de varredura corroboraram para sustentar as afirmativas acerca da melhora nas propriedades mecânicas do concreto autoadensável, uma vez que foi evidenciada uma menor quantidade de vazios graças à atividade pozolânica da cinza volante. Neste sentido, este trabalho contribui para a difusão do concreto autoadensável e seu uso em construções usuais, resultando em estruturas de concreto duráveis e confiáveis, reduzindo a necessidade de manutenções.&#x0D; ABSTRACT: The self-consolidating concretes stand out for their essential characteristics: flowability, passing ability and segregation resistance, allowing the increase of the structural elements quality, as well as the optimization of their production. However, in order to obtain its essential characteristics, the main factor is the use of fines, in order to control the negative effects of segregation and bleeding to which fresh concrete is susceptible. In this context, the aim of this paper is to compare the properties, in the fresh and hardened states, of self-consolidating concretes, using fly ash as fine material with the properties of a conventional concrete, produced with materials available in the Toledo-PR, Brazil. The results showed that the self-consolidating concrete presented better performance in relation to the mechanical properties compared to conventional concrete. Using scanning electronic microscopy the affirmations about the improvement in the mechanical properties of self-consolidating concrete were proven, since a smaller amount of voids was evidenced due to the pozzolanic activity of fly ash. In this sense, this work contributes to the diffusion of self-consolidating concrete in the literature and its use in usual constructions, resulting in durable and reliable concrete structures, reducing the maintenance works.

Influence of mixing time and superplasticizer dosage on self-consolidating concrete properties

Self-compacting concrete (SCC) requires specific properties, such as fillability, flowability, and passability. It also needs to resist bleeding and segregation, which may be caused by increased water or superplasticizer (SP) content. In addition, long periods of mixing deteriorate the properties of fresh SCC and causes difficulty in filling structure sections. This study investigates the effect of different mixing periods (e.g., 15, 30, 60, and 90min from the addition of water to the mixture) and increased SP doses (e.g., 1.5%, 2%, 2.5%, and 3% of cement mass) on the properties of SCC mixtures. The properties of fresh concrete were assessed by seven tests, namely, slump flow, V-funnel, slump flow T50, V-funnel T5, L-box, bleeding, and segregation. Hardened concrete was assessed on the basis of compressive, indirect, and flexural strengths. Results showed that compared with the slump flow under 15min mixing time, the 30, 60, and 90min increase in mixing time reduced slump flow by 6%, 19%, and 27%, respectively. Findings also showed that results of SCC segregation and bleeding decreased when increased mixing time. The results also appeared that compressive strength of SCC slightly decreased compared with that under 15min mixing time. The increase in dosage of superplasticizer has mitigated the negative effect for long mixing periods on the properties of concrete.

Effects of nano-TiO2, nano-Al2O3, and nano-Fe2O3 on rheology, mechanical and durability properties of self-consolidating concrete (SCC): An experimental study

The objective of this study is to assess and compare the effects of different nanoparticles, namely nano-TiO2, nano-Al2O3 and nano-Fe2O3, on the performance of self-consolidating concrete (SCC) in terms of fresh, mechanical, and durability properties through performing different experiments. TiO2, Al2O3, and Fe2O3 nanoparticles with the average diameter of 18, 15, and 14 nm were used with two different contents of 3% and 5% by weight of cement. For assessing the fresh properties of SCC, slump flow, V-funnel, L-box, and column segregation tests were conducted. For the mechanical properties, compressive strength of concrete was investigated, and for the durability properties rapid chloride migration (RCM), electrical resistivity, rapid chloride penetration (RCP), and water penetration depth tests were carried out. The result showed that the workability properties of the mixes slightly improved by 3% addition of nanoparticles while increasing this value to 5% decreased the workability. For higher content of nanoparticles, the incorporation of nanoparticles in the mixes increased the water demand and consequently caused a reduction of workability.For compressive strength, nano-Fe2O3 showed a superior effect on the enhancement of strength in comparison to nano-Al2O3 and nano-TiO2. This observation was attributed to the formation of calcium ferric hydrate (C-F-H) gel in the microstructure. Moreover, the addition of all the nanoparticles resulted in an improvement of durability properties. High surface area of nanoparticles provided nucleation sites for cement particles and expedited the hydration process development. The formation of a higher content of hydration products helped the densification of microstructure. Moreover, nanoparticles controled the growth pattern of C-S-H gel, which led to the formation of a homogenous microstructure with smaller pore sizes and consequently to lower permeability against penetration of aggressive ions i.e., chloride. It is concluded that partial replacement of cement with nanoparticles on average improved the compressive strength and durability properties of SCC, but resulted in a reduction of workability.

Effects of steel fibers on flexural strength and impact resistance for self-consolidating concrete plates

Self-Consolidating Concrete (SCC) can be considered as a major innovative satiric expansion in the future of concrete materials and technology during the recent three decades. It has evolved to make adequate compaction with easy concrete placement in constructions, which have overcrowded the restricted zones and reinforcement. This research aims to experimentally study the effect of steel fibers volumetric ratio (Vf ) and effect of chicken wire in enhancement of the behavior of the normal strength SCC. Two types of SCC concrete mixes were prepared and cast for this purpose. One of them was normal strength SSC to serve as a reference mix, while 0.75 % of steel fibers was used in the second one. Slump-flow test, L-box, J-ring and V-funnel tests had been done to investigate the properties of fresh SCC. Compressive strength of the reference SCC was about (33.5MPa) and for 0.75% steel fibers SCC was about (39.7MPa). In addition to that, six identical plate’s specimens of (400×400×20) mm were cast and tested to study the effect of steel fibers and chicken wire on the impact load resistance and flexural load of SCC. Results show that the impact load resistance for steel fibers SCC concrete had been increased by about 60% compared with the reference normal strength SCC mix, while an increase in impact load resistance for SCC of about 50% was gained by using chicken wire mesh. It was noted that the use of 0.75% steel fibers-SCC and chicken wire-SCC plates show an increase in impact resistance and flexural strength by about 20% and 2% compared to the reference normal strength SCC, respectively. The results also indicate that using steel fibers is useful in holding up the formation of transverse cracks and providing affirmative restraint to the successive growth of cracks of plate’s specimens.

A new proportioning approach of low and normal binder self-consolidating concrete based on the characteristics of fine mortar and granular skeleton

In total, 30 self-consolidating concrete (SCC) mixtures with normal and low binder contents were investigated as diphasic suspensions of visco-elastoplastic fine mortars (<1.25 mm) and coarse aggregate (>1.25 mm). The fresh and hardened properties of the investigated SCC mixtures were evaluated by the slump flow, V-Funnel, J-Ring, and L-Box test set-ups, as well as the compressive strength development after 28 and 56 days of age. On the other hand, the workability, rheological behavior, and mechanical properties of the corresponding fine mortar mixtures were characterized by the mini-slump flow, yield stress, plastic viscosity, storage, and loss moduli, as well as 28- and 56-days compressive strengths.The experimental results of the flowability, passing ability, and compressive strength of the investigated SCC mixtures were found to correlate well with the workability, visco-elastoplastic properties, and compressive strength of their corresponding fine mortars, as well as the relative coarse solid packing fraction (φ/φmax) of coarse aggregate (>1.25 mm). According to the established empirical correlations, new workability, rheological, and compressive strength-based design methods were proposed to identify the required fresh and hardened properties of the fine mortar and coarse aggregate to ensure proper properties of SCC. A new approach was also proposed to classify SCC mixtures based on their flow performance properties.

Predicting the rheology of self-consolidating concrete under hot weather

The flow behaviour of self-consolidating concrete (SCC) incorporating several types of supplementary materials was investigated under hot weather conditions (25–40°C) and prolonged mixing (up to 110 min). Experiments were conducted outdoors during the summer of 2014 in Abu Dhabi. The slump flow and rheological properties of SCC incorporating various types of supplementary cementitious materials (SCMs) were examined under such types of harsh environmental conditions. A portable concrete rheometer (BT2) was used to measure the rheological properties of the investigated SCC mixtures. In this study, the neural network technique was employed to predict the rheological properties of SCC under hot weather conditions and prolonged mixing. The ambient temperature, mixing time and SCMs were the network input parameters. The relative viscosity, relative yield stress and slump flow were the output parameters. The optimum network architecture was selected based on Akaike information criterion and mean absolute percentage error. Furthermore, a parametric study was conducted to investigate the sensitivity of the input variables to the developed artificial neural network (ANN) models using the Garson equation. The results showed that the developed ANN models were capable of predicting the rheological properties and slump flow of SCC as a function of temperature and mixing time.

The effects of calcium stearate on mechanical and durability aspects of self-consolidating concretes incorporating silica fume/natural zeolite

Moisture and aggressive ions transfer into concrete can be considered a significant threat to the durability of self-consolidating concretes (SCCs). To restrict moisture and aggressive ions transfer into concrete, utilizing damp-proofing agents is expected to be beneficial. These admixtures can decrease permeability of concrete, especially the permeability under non-hydrostatic condition, by providing a water-repellent layer along the capillary pores. This study investigated the impacts of calcium stearate (CS), as a damp-proofing agent, on durability properties of SCCs which were prepared with various types of supplementary cementitious materials (SCMs). In addition to durability properties, the effects of CS on mechanical characteristics and properties of fresh concrete, and microstructure have been studied as well. The outcomes demonstrated that in fresh concrete, CS (up to 7 kg/m3) prompted a decrease in workability and density of fresh concrete without any significant impact on slump loss. The results of hardened concrete evaluation also showed a reduction in either density of hardened concrete or compressive strength. Plus, microstructure analysis showed that incorporation of CS deteriorates both the cement paste and the interfacial transient zone. Eventually, although CS had a negligible impact on electrical resistivity, total water absorption, and chloride diffusivity, it was absolutely effective on permeability of concrete under non-hydro static pressure. In this regard, inclusion of CS drastically reduced the depth of capillary penetration of water in addition to short and long term water absorption. As a case in point, incorporation of 7 kg/m3 of CS decreased the last-mentioned parameters by respectively 60%, 72%, and 40% compared to the reference mixture after 120 days of moist curing.