Properties Of Pervious Concrete Research Articles

Cement Dosage and Granular Class as Key Factors in the Properties of Pervious Concrete: A Comprehensive Study

Cement Dosage and Granular Class as Key Factors in the Properties of Pervious Concrete: A Comprehensive Study

Assessing the impact of recycled concrete aggregates and metakaolin on the mechanical properties of pervious concrete

Population growth and urban expansion have increased impervious surfaces, leading to environmental issues such as stormwater runoff and groundwater depletion. Traditional concrete, while durable, contributes to these problems. There is a need for sustainable construction materials that can address environmental challenges and reduce the consumption of natural resources. Pervious concrete, enhanced with recycled aggregates (RCA) and supplementary cementitious materials (SCMs) like metakaolin (MK) present a potential solution. This study aims to improve the mechanical and durability properties of pervious concrete by incorporating RCA and MK, assessing their effects on workability, density, porosity, permeability, compressive strength and flexural strength. The incorporation of RCA resulted in increased aggregate porosity compared to natural aggregates. Workability was assessed using the slump test, density was measured, and porosity and permeability were evaluated. The results showed that incorporation of RCA generally decreased workability, density and strength, while the addition of MK improved these properties by refining the microstructure. Specifically, mixes with 10% MK demonstrated better performance in terms of increased compressive and flexural strengths, improved density and reduced porosity. The ANN model showed high accuracy in predicting compressive and flexural strengths. The study concludes that RCA and MK can enhance the mechanical and durability properties of pervious concrete.

The effects of coarser sand addition on thermal properties of pervious concrete

The effects of coarser sand addition on thermal properties of pervious concrete

Influence of aggregate size on pervious concrete properties with and without construction and demolition waste

This research evaluates the impact of aggregate sizes on pervious concrete properties, comparing aggregates of 12.5 mm and 19 mm, as well as replacing natural aggregates with recycled aggregates set at 0% and 50%. Four types of pervious concrete were produced, and their properties were determined: density, porosity, permeability coefficient, compressive strength, flexural tensile strength, and abrasion resistance. The results indicate that water permeability is directly related to pore size and is influenced by aggregate size (90% of the variation in pervious concrete permeability) and, to a lesser extent, by recycled aggregate content (10% of the variation). Mixes with larger aggregates (19 mm) demonstrated higher permeability coefficients. Replacing natural aggregates with recycled aggregate did not significantly affect the mechanical properties of pervious concrete, highlighting the effectiveness of waste processing and mixing procedures, allowing for the incorporation of 50% of recycled aggregate. The concretes met the requirements of the American Concrete Institute, suggesting technically feasible conditions for sustainable practices in the construction industry.

Current research status and application prospects of permeability and mechanical properties of pervious concrete

Permeable concrete, characterized by continuous porosity, offers excellent properties such as breathability, water permeability, sound absorption, water purification, and environmental enhancement. This paper comprehensively reviews previous research on permeable concrete, encompassing studies on mix design, workability, mechanical properties, drainage performance, sound absorption, and durability. It also discusses improvement measures and application prospects. Research indicates that the performance of permeable concrete is influenced by factors such as mix design, material composition, and construction techniques. Optimizing mix design, modifying material composition, and enhancing workability and mechanical properties can further improve the performance of permeable concrete. Permeable concrete shows broad application prospects in road engineering, landscaping, and environmental engineering, but further research and standardization are needed to support its widespread adoption.

Sustainable Pervious Concrete with Silica Fume as Cement Replacement: A Review

Pervious concrete is a unique type of concrete with high porosity that allows water to pass through. This characteristic makes it beneficial for various applications, such as stormwater management, groundwater recharge, and reduced heat island effect. However, pervious concrete typically requires more cement than conventional concrete because of its mix design. This increased cement content can be partially replaced with supplementary cementitious materials, such as silica fume. This review article investigates the influence of silica fume on the properties of pervious concrete, including the mechanical properties (compressive strength, splitting tensile strength, and flexural strength), durability (resistance to freeze–thaw cycles and abrasion), and environmental aspects. The article highlights that silica fume can improve the mechanical properties and durability of pervious concrete up to an optimal replacement level. The optimum replacement level of cement with silica fume was found to be 10%–15%. Beyond this level, the performance of pervious concrete decreases. The pervious concrete containing silica fume showed superior abrasion resistance and improved freeze–thaw resistance compared to conventional pervious concrete. In addition, incorporating silica fume in pervious concrete reduces cement usage, leading to a lower environmental impact and more sustainable construction practices. The article also analyzes the limitations of using silica fume, such as the potential for reduced workability because of its fine particle size. Overall, the review suggests that silica fume is a promising supplementary cementitious material for enhancing the performance and sustainability of pervious concrete.

Effect of Sustainable Materials on Some Properties of Pervious Concrete

Effect of Sustainable Materials on Some Properties of Pervious Concrete

Investigation on properties of Pervious Concrete incorporating Lime Calcined Clay Cement (LC3)

Investigation on properties of Pervious Concrete incorporating Lime Calcined Clay Cement (LC3)

Sustainable ecological pervious concrete (SEPC) based on modified corn-cob coarse aggregate: Crushing morphology, strength, pore properties, and durability

In terms of agricultural products, corn is the most abundant crop in the world, yet a significant portion of its cobs are thrown away each year, which is a terrible resource waste. This study uses modified corn-cob coarse aggregate (MCCA) and recycled aggregate (RA) to prepare sustainable ecological pervious concrete (SEPC). Five different substitution rates (0%, 25%, 50%, 75%, and 100%) are designed to investigate the effect of substitution rate on the crushing morphology, strength, pore properties, and durability of SEPC. The results show that the saturated water absorption of MCCA is 45.4% and its numerical tube pressure reaches 0.9 MPa. The test results show that the mix of MCCA reduces the compressive strength of SEPC but is beneficial to improve the stress state of SEPC by increasing its continuous porosity, planting opening size, frost resistance and resistance to sulfate erosion. At 50% replacement rate, comprehensive performance of SEPC is at its best. Specifically, test group with 50% MCCA substitution rate exhibits the lowest rate of compressive strength loss during freeze-thaw cycles (7.58%) and the best corrosion resistance coefficient (97.97%) when subjected to sulfate erosion. Therefore, MCCA can be used as a sustainable and ecological lightweight aggregate to improve some properties of pervious concrete.

Influence of Self-Compound Enhancer on Physical Properties of Pervious Concrete

The new enhancer was a self-compound enhancer (SCE) made of silica fume, potassium lignosulfonate and sodium silicate. The performance of the mixed enhancer was analyzed in depth by X-ray diffraction spectrum analysis (XRD) and infrared spectroscopy (FTIR) techniques to determine the feasibility of SCE. The new pervious concretes (PCs) were prepared using Portland cement as a binder, gravel and c-brass aggregates as the coarse aggregates and SCE as a new enhancer. A series of laboratory experiments were carried out to study the influence of the different amounts of SCE on the compressive strength, water permeability coefficient and microstructure of cement hydration products of high-strength and high-permeability pervious concrete (HHPC). When the amount of SCE reached 3.8–4.0%, a maximum of the compressive strength of HHPC reached 31.33 MPa, and a maximum of the water permeability coefficient of HHPC reached 2.48 mm/s. At this time, a dense and solid network C-S-H was formed in the cement slurry, and the momentum of C-S-H divergence at the junction was very strong. The test results show that when SCE is used as a new enhancer, HHPC can form a perfect skeleton-void structure, which not only meets the engineering strength requirements, but also meets the requirements of eco-friendly water permeability and permeability. It is an environment-friendly concrete.

Correlations among physical properties of pervious concrete with different aggregate sizes and mix proportions

Permeable pavement material can benefit urban environment. Here in this work, different aggregate sizes and mix proportions were used to manufacture pervious pavement concrete and investigate correlations among its properties. The porosity, permeability, compressive strength, inner structure, thermal conductivity, and abrasion resistance of the specimens were obtained. Results showed lower aggregate-to-cement ratios and higher water-to-cement ratios led to porosity reduction, which decreased the permeability coefficient but increased the compressive strength, thermal conductivity, and abrasion resistance of the pervious concrete. Compared to the mixes, the aggregate sizes affected the physical properties of pervious concrete less. However, the sizes of pores and cement in the pervious concrete were more affected by aggregate sizes than by mixes. Moreover, the porosity, permeability coefficient, and compressive strength of the pervious concrete can be correlated by the power law, whereas the correlation between the porosity and abrasion resistance index can be fitted by a linear law.

EXPERIMENTAL INVESTIGATION AND INTELLIGENT PREDICTION OF MECHANICAL STRENGTH OF PERVIOUS CONCRETE

This study determines the mechanical strength characteristics of pervious concrete using fuzzy logic. During construction, the process of determining the quality of concrete produced takes about 28 days before testing, training the fuzzy logic model through the research data gotten from the laboratory experiments in order to intelligently predict the mechanical strength of pervious concrete. Crushed granite was used in this experiment to ensure the pervious concrete has a little degree of fine aggregates and the maximum size of coarse aggregate used was 20 mm. Compressive, flexural and split tensile strength tests were carried out on pervious concrete of mixing ratios 1:4, 1:5 and 1:6 with each of the mixing ratios having varying water to cement ratios of 0.4, 0.5, 0.6 and 0.7. The developed fuzzy logic model was applied to predict the mechanical strengths of the concrete by using data obtained from experimental results, with input parameters of water content, crushing value, weight and density and the mechanical strengths as the output parameters employing the triangular membership function. The model was calibrated using the error measures of the root mean square error (RMSE), mean absolute percentage error (MAPE) and R squared were computed for the model. In this study, it was observed that higher water to cement ratio slightly reduces the mechanical strength of PC but increases the workability compared to increase in cement to granite ratio which notably increases the strength and reduced the workability, alternatively, higher water to cement ratio causes a notable decrease in permeability of the pervious concrete. The correlation between the experimental and predicted values was excellent. This shows that fuzzy logic can be used to predict the mechanical properties of pervious concrete, and fuzzy logic can also be used to appropriately deduce missing values in the mechanical properties of PC subject to further research

A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

Development of a Methodical Framework to Calculate Rational Height of the Riser Strip in Pervious Concrete Pavement Construction

Abstract Pervious concrete pavement (PCP) system is an emerging technology due to its sustainability and stormwater management capabilities. Globally, there is no standard procedure for the design and construction of PCPs. However, one empirical technique used during the field implementation encompasses the provision of 9–9 mm of riser strip for PCP surface course, as also suggested by the American Concrete Institute. To advance the PCP design toward a mechanistic approach, this paper provided a methodology to compute the rational height of the riser strip based on correlations between different properties of pervious concrete (PC) and the uncompacted PC mixture density. Additionally, a user-interactive program called “Pervious Concrete Pavement Construction Assistant Program (PCPCAP)” was also developed using MATLAB. Furthermore, the proposed methodology was evaluated by preparing small-scale test slabs in the laboratory and field with a target porosity of 34 %. Cores were extracted from the 7-day-cured slab and tested for porosity and hardened density. The results showed an excellent match between target and measured porosities with a difference of less than 3 %. Additionally, the calculated hardened density corresponding to the target porosity and the measured hardened density were also in good agreement, with a difference of only 3 %. It is noteworthy that the proposed framework will help during the construction of PCPs, conforming to the desired properties in an effective and practicable manner. Overall, it is envisioned that this first-of-its-kind methodical technique could be used by contractors and practitioners to enhance the quality of PCP construction as part of field implementation practices.

Exploring the impact of nano-limestone cementitious material on mechanical, infiltration, and microstructure properties of pervious concrete

Exploring the impact of nano-limestone cementitious material on mechanical, infiltration, and microstructure properties of pervious concrete

Influence of nanosilica and polypropylene fibers on the permeability, compressive and flexural strength of pervious concrete

The article examines the importance of pervious concrete in construction, emphasizing the need to balance the required permeability with necessary strength. The incorporation of nanosilica and polypropylene fibers into pervious concrete was evaluated, considering compressive and flexural strength, void percentage, and permeability. The methodology included an experimental mix design and specific tests. The results showed significant improvements in the properties of pervious concrete. For instance, compressive strength increased from 128.01 kg/cm² in the standard concrete to 216.08 kg/cm² with the addition of 0.12% polypropylene and 1% nanosilica. Similarly, flexural strength exhibited substantial increases, from 18.76 kg/cm² in the standard to 34.11 kg/cm² and 43.42 kg/cm² with the respective dosages. Regarding permeability, the coefficient decreased from 2.60 cm/s in the standard concrete to 2.50 cm/s with the addition of 0.12% polypropylene and 1% nanosilica. In summary, the research supports the effectiveness of these additives in enhancing the performance of pervious concrete, with improvements of up to 68.8% in compressive strength and 131.4% in flexural strength.

Mechanical and clogging characteristics of SBR modified pervious concrete reinforced with geogrids - A Functional Data Analysis approach

Pervious concrete is a special type of concrete with high porosity but with limited structural strength. Geogrid reinforced pervious concrete is a specialized type of pervious concrete that incorporates geogrids for added structural performance. The composite material benefits from the geogrid's tensile strength and load-spreading capability with the addition of geogrids. Present study aims at investigating the mechanical, shrinkage and clogging characteristics of Styrene Butadiene Rubber (SBR) modified pervious concrete reinforced with glass fiber mesh, HDPE mesh, fiber glass geogrid, HDPE geogrid and coir geogrid. SBR modification is done from 0% to 15% by weight of cement The results show a palpable improvement in flexural strength of pervious concrete. HDPE geogrid provides almost the double flexural strength as non-reinforced pervious concrete. SBR modification of pervious concrete also enhanced the mechanical properties. Each grid/mesh has its own optimum dosage of SBR for maximum flexural strength. Laying geogrids can reduce the drying shrinkage of pervious concrete. The relative contact area of grid/mesh with the cement paste is a critical factor in reducing drying shrinkage. However, geogrid can lead to clogging in pervious concrete. Soil particles get accumulated in the void spaces and thereby reduce its permeability. Coir geogrid traps a larger quantity of soil particles impairing the permeability. Functional regression modelling by Functional Data Analysis approach is used to analyse the relationship between various grids and meshes with the properties of pervious concrete. The p-value and derivative plots gives better insight into the factorial effects.

Influência da espessura e do volume da pasta de cimento nas propriedades dos concretos permeáveis

Abstract This study aimed to identify the influence of replacing coarse natural aggregate with coarse recycled concrete aggregate on the thickness and volume of the cementitious paste under the variation of the water/cement ratio in the fresh and hardened properties of pervious concrete. The determined theoretical paste thickness was inefficient for pervious concrete dosage. However, it was found that the paste volume was the parameter that was best related to the mechanical and permeability properties of the studied material. Pervious concrete with natural aggregates showed higher compressive strength than concrete with recycled aggregates, although both met the regulations. All the concretes produced, except one with recycled aggregate of w/c ratio 0.25, reached the tensile strength in the minimum design bending. Pervious concrete with recycled aggregates showed more significant mass loss by abrasion and more porosity than concretes with natural aggregates. Finally, all pervious concretes presented permeability coefficients greater than the lower limit determined by the standard.

A dynamic system analysis study on the design of high-performance pervious concrete ratios

Abstract As permeable concrete contains more pores and larger pore size when improving its water permeability, it will affect its mechanical properties and durability, so it is of great significance to study the mixing ratio of porous concrete. Studying the mixing ratio of porous concrete is of great significance. The subject is studied in depth from the aspects of mechanical properties and water permeability, in order to prepare high-performance permeable concrete with high compressive strength and meet the requirements of infiltration. Firstly. Optimization of the performance of raw materials and mixing ratios of porous concrete, according to the aggregate gradation, aggregate particle size, and other factors on the mechanical properties of porous concrete, to determine its optimal aggregate mixing ratio. Three groups of high-performance pervious concrete specimens with different aggregate particle sizes and pore structures were examined for their real fine structure. Finally, after the preparation of high-performance pervious concrete was completed, the porosity, fractal dimension, equivalent diameter, contour coefficient, and roundness of the specimens were tested to investigate the effects of several factors mentioned above on the permeability coefficient and compressive strength properties of pervious concrete. The results show that the two-dimensional pore diameter is normally distributed, the diameter size is centrally distributed in the range of 0~10mm, and the number of pores in this range accounts for more than 70%. Gradually increasing aggregate particle size leads to an increase in the proportion of large pores inside the specimen. After the compressive strength test and porosity test, it was found that the water permeability coefficient of the porous concrete was the best for the single-grain limestone aggregate with the equivalent diameter range of 5~8mm. The results of this study have theoretical value in enriching and developing high-performance permeable concrete.

Impact of recycled concrete aggregates on the strength and durability properties of pervious concrete

An investigation was designed to assess the performance of pervious concrete prepared with fly ash (FA) and recycled concrete aggregates (RCA) in place of Portland cement (PC) and natural aggregates (NA). The percentage of NA replacement with RCA was varied (0%, 50% and 100%), while the percentage of FA substitution was fixed at 10%. Various fresh (workability and consistency), mechanical (compressive strength, split tensile and shear strength), durability (abrasion resistance, freeze–thaw resistance, flexure and acid resistance) and microstructural properties of the pervious concretes were evaluated after different curing periods. The findings showed that the incorporation of RCA at different levels and partial substitution of FA was desirable pervious concrete used for structural and pavement construction purposes. The incorporation of 10% FA in addition to higher levels of RCA was found to be particularly beneficial in refining the microstructure of pervious concrete. A homogenous microstructure with dense and layered calcium silicate hydrate and calcium hydroxide was observed for the mix made with 10% FA and 100% RCA.