Strength Development of Pervious Concrete Embedded with Latex and Polypropylene Fiber

Author(s):  
Afifudin Habulat ◽  
Hamidah Mohd Saman ◽  
Muhd Norhasri Muhd Sidek ◽  
Daliah Hassan ◽  
Nor Hafida Hashim
Author(s):  
A A M Sharif ◽  
S Shahidan ◽  
H B Koh ◽  
A Kandash ◽  
S S Mohd Zuki

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 321 ◽  
Author(s):  
Haitang Zhu ◽  
Chengcheng Wen ◽  
Zhanqiao Wang ◽  
Lan Li

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.


Author(s):  
Chandrahas Bhimrao Patil ◽  
Pradip Shanker Shinde ◽  
Bajirao Mahadeo Mohite ◽  
Shrikant Subhash Ingale ◽  

2016 ◽  
Vol 47 ◽  
pp. 01007 ◽  
Author(s):  
S. Shahidan ◽  
H. B. Koh ◽  
A. M. Sharif Alansi ◽  
L. Y. Loon

This paper evaluates the effect of aggregate/cement ratio on the strength development of pervious concrete. To evaluate this study, mixture proportions have been prepared by varying the aggregate/cement ratio and studying its compressive strength development. Four different aggregate cement ratios were chosen and its strength development at 7 days and 28 days is studied. It has been observed that lesser the aggregate/cement ratio greater the strength and vice versa


2016 ◽  
Vol 692 ◽  
pp. 17-26 ◽  
Author(s):  
S. Arundhathy ◽  
V. Vasugi

Upcoming infrastructure and maintenance focuses on sustainable infrastructure. To solve this, certain cement – based materials are developed. Engineered Cementitious composite (ECC) has been developed as an improved version of Fiber Reinforced Cement. The most outstanding properties of ECC are its high tensile ductility and fine multiple cracking. It is basically a composite similar to mortar added with fine fibers such as steel fibers and polymer fibers. A composite with high ductility is made retaining the original properties of normal concrete leads to a sustainable and serviceable construction. The materials used for ECC are cement, fly ash, fine cement, admixtures, fibers and water. Sand used in this mix is very fine which have 0.1mm dia. The fibers used in this study are polypropylene and steel fiber. Fibers are added at the rate of 0.5%, 1%, 1.5%, 2% volume of cement. This paper deals with the experimental investigation of compressive strength, tensile strength, and flexural strength of ECC made with polypropylene and a mixed proportion of polypropylene with steel fiber with different volume percentages i.e., 2%, 1.5%, 1% and 0.5%. It is observed that addition of fibers increased the ductile behavior. ECC with polypropylene fiber had shown significant improvement in tensile and flexural strength while ECC with hybrid fiber had given appreciable compressive strength development. These efforts will focus on the development of sustainable green material, which reduces the negative impact of existing concrete on the environment. The potential application of ECC to achieve structural sustainability has been observed from the results obtained.


2008 ◽  
Author(s):  
Sarah A. Schnitker ◽  
Justin L. Barrett ◽  
Robert A. Emmons

Long-term experience of application of a method of electric heating by heating wires of the monolithic concrete and reinforced concrete structures erected in winter conditions is analyzed. This method, developed by the author of the article, took a dominant position on the construction sites due to the simplicity and efficiency in comparison with the mass applied in those years, the method of electric heating of concrete with steel round and strip electrodes. The data on labor intensity, material and energy costs in comparison with the method of rod electric heating are presented. Step-by-step technological operations on preparatory works and electric heating of monolithic structures with the use of extensive hands-on material, which formed the basis for the development of technological regulations, supplemented by a number of new proposals to improve the technology of works, are concretized. In order to work out the optimal mode of heat treatment, the studies of the concrete thermal conductivity factor in the process of its heating and strength development were carried out. The method for calculation of the basic parameters of concrete electric heating is presented. For simplification of calculations, for a wide contingent of masters, superintendents and technical personnel, the nomogram , making it possible with sufficient accuracy under the construction conditions to calculate the necessary heating parameters, was developed. The necessity of grounding the heating wire remaining in the concrete to reduce the harmful effect of magnetic radiation from various appliances and household appliances on the human body is noted.


2012 ◽  
Vol 2 (3) ◽  
pp. 102-104 ◽  
Author(s):  
Suthar Sunil B ◽  
◽  
Dr. (Smt.) B. K. Shah Dr. (Smt.) B. K. Shah

2001 ◽  
Vol 50 (8) ◽  
pp. 807-811
Author(s):  
Harutake IMOTO ◽  
Etsuo SAKAI ◽  
Akinori NAKAMURA ◽  
Masaki DAIMON

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