scholarly journals Effect of Recycled Rubber Particles on the Deicing Salt-Scaling Durability of Concrete

2021 ◽  
Vol 03 (03) ◽  
pp. 1-1
Author(s):  
Layachi Guelmine ◽  
◽  
Hadda Hadjab ◽  
Keyword(s):  
Partial Substitution ◽  
Dune Sand ◽  
Ordinary Concrete ◽  
Salt Scaling ◽  
Cement Based Materials ◽  
Rubber Particles ◽  
Recycled Rubber ◽  
Natural Dune ◽  
Rubber Concrete ◽  
Scaling Resistance

The present study investigated the effect of reused rubber particles (RRP) on the deicer salt durability of ordinary concrete. Four mixtures were designed, a control concrete (CC) and three other rubber concretes obtained by partial substitution of natural dune sand aggregate with reused rubber particles with 0%, 3%, 6%, and 9% w/w. All studied concretes were subjected to the combined effect of freeze/thaw (56 and 120) cycles with the deicer salt solution of 3% NaCl. The results indicated that RRP improved the deicer-salt scaling resistance of rubber concrete strongly compared with the control. The observed innovative property of RRP could be applied to cement-based materials to improve their deicer salt durability. Further, this environmentally friendly practice could reduce the stock of waste tires and offer a renewable source of construction aggregates.

scholarly journals Experimental Investigation of the Influence of Cellulose Ether on the Floating of Rubber Particles in Mortar

Complexity ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Jian Liang ◽  
Bin Zhang ◽  
Changshun Liu ◽  
Chao Zhang
Keyword(s):  
Chemical Properties ◽  
Lightweight Aggregate ◽  
Crumb Rubber ◽  
Lightweight Aggregate Concrete ◽  
Cellulose Ether ◽  
Physical Interaction ◽  
Practical Application ◽  
Cement Based Materials ◽  
Rubber Particles ◽  
Rubber Concrete

As a kind of hyperelastic material, rubber can be mixed into mortar (or concrete) to improve the anticracking ability and ductility of concrete. The mixture of rubber can change the internal structure of concrete through physical interaction, without changing the chemical properties of each component in the mortar (or concrete). But since the apparent density of rubber is far less than the density of cement-based materials, rubber particles are likely to separate from cement-based materials in the mixture of rubber and mortar, and consequently, rubber particles will float upward. This study proposes a new method to restrain the rubber particles from floating upward: add cellulose ether in the mortar with a water-cement ratio of 0.45 so as to improve the mobility of mixture. Meanwhile, this study employs the method of quadratic orthogonal rotation combination experiment to carry out research on the influence of the mixing amount of cellulose ether (0∼5.43 kg/m3) and the ratio of rubber substituting for mortar (0∼0.5) on the degree of uniformity, consistency, and 28-day (28 d) strength of crumb rubber mortar, and it also studies the inhibiting effect of cellulose ether on the floating of rubber. The results show that cellulose ether mixed into the mortar can significantly improve the mobility of the mixture and restrain the floating of rubber. But with the increase of the mixing amount of cellulose ether, the 28 d strength of the mortar shows an obvious decreasing trend. This study has a guiding role in the practical application of crumb rubber mortar, crumb rubber concrete, and other lightweight aggregate concrete.

Experimental Study on Ratio of Bending-Compressive Strength of the Crumb Rubber Concrete Modified by Latex

2014 ◽  
Vol 941-944 ◽  
pp. 761-764
Author(s):  
Wei Li ◽  
Zhen Huang ◽  
Xiao Chu Wang ◽  
Zi Sheng Zang
Keyword(s):  
Mechanical Property ◽  
Experimental Study ◽  
Compressive Strength ◽  
Surface Modification ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Interface Effect ◽  
Rubber Particles ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

The cementitiousness between rubber particles and cement-based material could be raised because of the surface modification of rubber,thus enhance the mechanical property of crumb rubber concrete and improve the interface effect of rubber particles.We had researched the change regulation about the ratio of bending-compressive strength of the crumb rubber concrete modified by latex,the concrete with various quantity of rubber,under the condition dosage of latex is 0.5% of cement quality.The result of experimental prove that,compressive strength, splitting tensile and flexural strength could be enhanced because of latex injecting,and the ratio of bending-compressive strength could be enhanced at the same time.

scholarly journals EFFECT OF MIXING TIME ON THE SALT SCALING RESISTANCE OF CONCRETE WITH MICROSPHERES

2017 ◽  
Vol 71 (1) ◽  
pp. 373-378
Author(s):  
Yuto TANAKADATE ◽  
Shunsuke HANEHARA ◽  
Tetsuya OYAMADA ◽  
Kazuma IGARASHI
Keyword(s):  
Mixing Time ◽  
Salt Scaling ◽  
Scaling Resistance

scholarly journals Review of Carbonation Resistance in Hydrated Cement Based Materials

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Joseph Mwiti Marangu ◽  
Joseph Karanja Thiong’o ◽  
Jackson Muthengia Wachira
Keyword(s):  
Environmental Benefits ◽  
Partial Substitution ◽  
Cement Matrix ◽  
Hardened Cement ◽  
Hydrated Cement ◽  
Blended Cements ◽  
Carbonation Process ◽  
Carbonation Resistance ◽  
Cement Based Materials ◽  
Process Factors

Blended cements are preferred to Ordinary Portland Cement (OPC) in construction industry due to costs and technological and environmental benefits associated with them. Prevalence of significant quantities of carbon dioxide (CO2) in the atmosphere due to increased industrial emission is deleterious to hydrated cement materials due to carbonation. Recent research has shown that blended cements are more susceptible to degradation due to carbonation than OPC. The ingress of CO2 within the porous mortar matrix is a diffusion controlled process. Subsequent chemical reaction between CO2 and cement hydration products (mostly calcium hydroxide [CH] and calcium silicate hydrate [CSH]) results in degradation of cement based materials. CH offers the buffering capacity against carbonation in hydrated cements. Partial substitution of OPC with pozzolanic materials however decreases the amount of CH in hydrated blended cements. Therefore, low amounts of CH in hydrated blended cements make them more susceptible to degradation as a result of carbonation compared to OPC. The magnitude of carbonation affects the service life of cement based structures significantly. It is therefore apparent that sufficient attention is given to carbonation process in order to ensure resilient cementitious structures. In this paper, an indepth review of the recent advances on carbonation process, factors affecting carbonation resistance, and the effects of carbonation on hardened cement materials have been discussed. In conclusion, carbonation process is influenced by internal and external factors, and it has also been found to have both beneficial and deleterious effects on hardened cement matrix.

Experimental Study on Proportion of Tensile Strength and Compressive Strength of the Crumb Rubber Concrete Modified by Latex

2014 ◽  
Vol 919-921 ◽  
pp. 1916-1919
Author(s):  
Wei Li ◽  
Zhen Huang ◽  
Xiao Chu Wang ◽  
Zi Sheng Zang
Keyword(s):  
Mechanical Property ◽  
Experimental Study ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Surface Modification ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Rubber Particles ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

The cementitiousness between rubber particles and cement-based material could be raised because of the surface modification of rubber,thus enhance the mechanical property of crumb rubber concrete and improve the interface effect of rubber particles.We had researched the change regulation of the ratio between tensile strength and compressive strength of the Crumb Rubber Concrete Modified by latex,the concrete with various quantity of rubber,under the condition Dosage of latex is 0.5% of cement quality.The result of Experimental prove that,compressive strength, splitting tensile and flexural strength could be enhanced because of latex injecting,and the ratio between tensile strength and compressive strength could be enhanced at the same time.

Experimental Study on the Mechanical Properties of the Crumb Rubber Concrete

2013 ◽  
Vol 645 ◽  
pp. 172-175
Author(s):  
Wei Li ◽  
Xiao Chu Wang ◽  
Jun Wei Wang ◽  
Chuan Ji Wang
Keyword(s):  
Mechanical Properties ◽  
Deformation Property ◽  
Plain Concrete ◽  
Crumb Rubber ◽  
Ordinary Concrete ◽  
Testing Method ◽  
Fine Aggregates ◽  
Crumb Rubber Concrete ◽  
Tensile Splitting Strength ◽  
Rubber Concrete

The mechanical properties of concrete with composition of scrapped rubber tyre crumb replacing part of the fine aggregates were investigated. The testing method of the mechanical properties was executed according to . Many groups of crumb rubber concrete specimens are manufactured in different kinds of size and amount of rubber chips. The powder rubber and crumb rubber were mixed into C35 plain concrete, by the volume rations of 0%, 20%, 40 %, 60%, 80% and 100% of the fine aggregates, to investigate the influence of size and amount of rubber chips on the mechanical properties. The results of test indicate: the cubic compression strength, the tensile splitting strength and the strength of rupture decreased with the increase of rubber admixture. But there are some remarkable properties which is difficult to attain on ordinary concrete, such as better cracking resistance, better deformation property, minor density and so on.

Sign in / Sign up

Export Citation Format

Share Document