Studies on the Influence of Water Cement Ratio on the Properties of Pervious Concrete Made With Natural and Recycled Aggregate

The mixture proportion of recycled concrete was discussed by orthogonal design method. The influence of water-cement ratio, recycled aggregate quantity on workability, cube compressive strength of recycled concrete was analyzed. The experimental results indicated that，Recycled concrete mix proportion design should consider the impact of the water absorption of recycled aggregate. Unit water amount of recycled concrete should be plain concrete unit water consumption and recycled aggregate additional amount of water. Sand ratio should increase in the corresponding ordinary aggregate concrete sand ratio on the basis of 1 to 3 percent. When the water-cement ratio is 0.36 and construction waste content of 40% slag content of 20%, 28d compressive strength of concrete is 48.1MPa, slightly higher than the reference concrete (48.0MPa).

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Study on the Permeability of Recycled Aggregate Pervious Concrete with Fibers

Materials ◽

10.3390/ma13020321 ◽

2020 ◽

Vol 13 (2) ◽

pp. 321 ◽

Cited By ~ 5

Author(s):

Haitang Zhu ◽

Chengcheng Wen ◽

Zhanqiao Wang ◽

Lan Li

Keyword(s):

Compressive Strength ◽

Permeability Coefficient ◽

Polypropylene Fiber ◽

Volumetric Analysis ◽

Pervious Concrete ◽

Recycled Aggregate ◽

Fiber Types ◽

Cross Sectional ◽

Cement Ratio ◽

Water Cement Ratio

Pervious concrete is considered to be porous concrete because of its pore structure and excellent permeability. In general, larger porosity will increase the permeability coefficient, but will significantly decrease the compressive strength. The effects of water-cement ratio, fiber types, and fiber content on the permeability coefficient, porosity, compressive strength, and flexural strength were investigated. The pore tortuosity of the pervious concrete was determined by volumetric analysis and two-dimensional cross-sectional image analysis. The concept and calculation method of porosity tortuosity were further proposed. Results show that the permeability coefficient of the pervious concrete is the most suitable with a water-cement ratio of 0.30; the water permeability of the pervious concrete is influenced by fiber diameter. The permeability coefficient of pervious concrete with polypropylene thick fiber (PPTF) is greater than that with copper coated steel fiber (CCF) and the polypropylene fiber (PPF). The permeability coefficient is related to tortuosity and porosity, but when porosity is the same, the permeability coefficient may be different. Finally, general relations between the permeability coefficient and porosity tortuosity are constructed.

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Study on Preparation of Solid Concrete Brick with Recycled Aggregate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.648.108 ◽

2013 ◽

Vol 648 ◽

pp. 108-111

Author(s):

Qi Jin Li ◽

Guo Zhong Li

Keyword(s):

Compressive Strength ◽

Mass Fraction ◽

Recycled Aggregate ◽

Preparation Process ◽

Mass Ratio ◽

Construction Waste ◽

Cement Ratio ◽

Water Cement Ratio ◽

Optimal Value

The construction waste was processed into recycled aggregate to produce solid construction waste brick with grade of MU20. The preparation process of recycled aggregate and the optimal value of mass ratio of water to cement (water cement ratio) and mass ratio of recycled aggregate to cement was studied. The results shows that when the water cement ratio is 0.86 and the mass ratio of recycled aggregate to cement is 5.5 and the dosage of activator is 0.25% (mass fraction with recycled aggregate), the compressive strength of sample is 22.5MPa and can be satisfied with the requirement of MU20 solid concrete brick.

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Roles of mortar volume in porosity, permeability and strength of pervious concrete

Journal of Infrastructure Preservation and Resilience ◽

10.1186/s43065-021-00033-2 ◽

2021 ◽

Vol 2 (1) ◽

Author(s):

Leo Gu Li ◽

Jia-Jian Feng ◽

Bo-Feng Xiao ◽

Shao-Hua Chu ◽

Albert Kwok Hung Kwan

Keyword(s):

Open Porosity ◽

Pervious Concrete ◽

Fine Aggregate ◽

Strength Performance ◽

Cement Ratio ◽

Interconnected Porosity ◽

Water Cement Ratio ◽

Major Factors

AbstractPervious concrete is designed to be porous to allow permeation of water and air for combating the environmental and drainage problems arising from urbanization. However, despite extensive research, it is still not clear how best to design pervious concrete mixes to achieve good concurrent permeability-strength performance. In a previous study, the authors found that there is a necessity to distinguish between interconnected porosity and open porosity, and between unsubmerged permeability and submerged permeability. In this study, based on the thinking that fine aggregate may be added to reduce the paste volume provided the fine aggregate is fine enough to form a coherent mass with the paste, further research was conducted to develop the mortar type pervious concrete with reduced paste volume and investigate the roles of the mortar volume in porosity, permeability and strength. A new series of concrete mixes with varying mortar volume were tested and the results revealed that the interconnected porosity is the major factor determining the permeability while the open porosity and water/cement ratio are the major factors determining the strength. More importantly, the mortar volume plays a key role in each performance attribute.

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Influence of Water-Cement Ratio on Mortar in which Shrinkage is Restrained

ACI Journal Proceedings ◽

10.14359/11376 ◽

1958 ◽

Vol 55 (11) ◽

Keyword(s):

Cement Ratio ◽

Water Cement Ratio ◽

Influence Of Water

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Experimental Investigation on the Influence of Water-Cement Ratio on Air-Void Parameters of Cement Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.771.29 ◽

2013 ◽

Vol 771 ◽

pp. 29-33

Author(s):

Jin Xi Zhang ◽

Chao Wang ◽

Ming Yang Guo ◽

Mao Cheng Ma

Keyword(s):

Experimental Investigation ◽

Hardened Concrete ◽

Cement Concrete ◽

Marked Rise ◽

Air Voids ◽

Cement Ratio ◽

Water Cement Ratio ◽

Influence Of Water ◽

Air Void ◽

The Impact

This paper studies the effect of water-cement ratio [w/ on the air-void parameters of cement concrete, which has a significant influence on the durability of concrete. Based on the experimental investigation, it is found that the impact on the air content of hardened concrete due to different water-cement ratio is not great. Test results also indicate that with the increase of water-cement ratio, the spacing factors also experienced a marked rise, and the mean diameters as well as the specific areas of air voids evidently increased or declined, respectively, which may lead to an adverse effect on the frost resistance of concrete.

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Influence of Water–Cement Ratio on the Hydraulic Behavior of an Artificially Cemented Sand

Geotechnical and Geological Engineering ◽

10.1007/s10706-017-0190-3 ◽

2017 ◽

Vol 35 (4) ◽

pp. 1513-1527 ◽

Cited By ~ 2

Author(s):

Rafaela Cardoso

Keyword(s):

Cemented Sand ◽

Cement Ratio ◽

Water Cement Ratio ◽

Hydraulic Behavior ◽

Influence Of Water

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Experimental Study on the Influence of Water Cement Ratio on the Compressive Strength of Shale Ceramsite Concrete

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.204-208.3895 ◽

2012 ◽

Vol 204-208 ◽

pp. 3895-3898 ◽

Cited By ~ 1

Author(s):

Zhen Min Cao ◽

Zhi Gang He ◽

Yi Yang

Keyword(s):

Compressive Strength ◽

Strength Properties ◽

Light Weight ◽

Concrete Compressive Strength ◽

Cement Ratio ◽

Water Cement Ratio ◽

General Law ◽

Influence Of Water ◽

Light Weight Aggregate ◽

Experimental Preparation

Shale ceramsite concrete is a kind of light weight aggregate concrete. In this paper shale ceramsite concrete compressive strength properties are studied by experimental preparation of different water cement ratio, and made an analysis of compressive strength comparatively among 7 days, 28 days, 56 days. The result shows that the rules of compressive strength of shale ceramsite concrete are in line with the general law strength of concrete, and increases with the age increasing, decreases with water cement ratio increasing, but they are not entirely linear relationship.

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