scholarly journals Synergistic Interaction of Polypropylene Fibres in Latex Modified High Strength Concrete

2013 ◽  
Vol 59 (3) ◽  
pp. 321-335 ◽  
Author(s):  
S. Thirumurugan ◽  
A. Sivakumar
Keyword(s):  
Compressive Strength ◽  
Film Formation ◽  
High Strength ◽  
Plain Concrete ◽  
Relative Volume ◽  
Styrene Butadiene Rubber ◽  
Cement Matrix ◽  
Butadiene Rubber ◽  
Polypropylene Fibres ◽  
Styrene Butadiene

Abstract Synthetic polymer latexes, such as styrene-butadiene rubber (SBR) latex addition in Portland cement has gained wider acceptance in many applications in the construction industry. Polymer-modified cementitious systems seals the pores and micro cracks developed during hardening of the cement matrix, by dispersing a film of polymer phase throughout the concrete. A comprehensive set of experimental test were conducted for studying the compressive properties of SBR latex polymer with crimped polypropylene fibres at relative volume fractions of 0.1 and 0.3%. The results indicated that the addition of polypropylene fibre has little effect on the reduction in the workability of concrete composite containing fly ash and SBR Latex. Increase in polypropylene fibres upto 0.3% Vf showed increase in compressive strength upto 57.5MPa. The SBR concrete without fibre showed an increase in strength upto 20 % compared to plain concrete. Test results also indicated that the compressive strength was increased in SBR fibre concrete by means of an ordinary dry curing process than wet curing because of their excellent water retention due to polymer film formation around the cement grains. On the contrary the compressive strength reduces for SBR fibre concretes under wet curing compared to dry curing

scholarly journals Mechanical Properties of Water Purification Industry Used Natural Rubber/Styrene-Butadiene Rubber Blends that Prepared Via Different Sulfur Curing Systems

2020 ◽  
Author(s):  
Wenfa Dong ◽  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Relative Volume ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends ◽  
Styrene Butadiene

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

scholarly journals Strength and Durability of Styrene –Butadiene Latex Modified Concrete with Silica Fume

2020 ◽  
Vol 9 (5) ◽  
pp. 2119-2125
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Silica Fume ◽  
Chloride Ion ◽  
Polymer Binder ◽  
Latex Film ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Binder Ratio ◽  
Styrene Butadiene

This paper discussed the properties of styrene butadiene rubber (SBR) latex modified concrete. The latex modified concrete using SBR latex were prepared with various polymer-binderratios and tested for compressive strength, flexure strength, elastic modulus and rapid chloride penetration test. Latex contents were varied as 5, 10 and 15 percentages by mass of binder (cement and silica fume). The effect of the polymer-binder ratio on the properties of latex modified concrete was examined. It was concluded from the test results that the compressive strength and elastic modulus decrease with polymer binder ratio and flexural strength increasing with polymer binder ratio. Addition of latex reduces the chloride ion penetration due to latex film formation..

scholarly journals Fresh and Hardened Properties of Styrene Butadiene Rubber (SBR) Modified Concrete

2020 ◽  
Vol 5 (4) ◽  
pp. 457-461
Author(s):  
Muhammad Ahmed Qadri ◽  
Huzaifah Hameed ◽  
Osama Bhutta
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Total Porosity ◽  
Lower Percentage ◽  
Partial Replacement ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Chloride Induced Corrosion ◽  
Hardened Properties ◽  
Styrene Butadiene

The durability of concrete has been studied ever since it was first used. Researchers have incorporated several materials to make concrete strong and durable. This research focuses on the infusion of styrene butadiene rubber polymer (SBR) as a partial replacement of cement and studies its effects on fresh and hardened properties of concrete. Samples were prepared using partial replacement of SBR in proportions of 0%, 5%, 10% and 20%. Results showed that the fresh density of concrete decreased with the addition of SBR whereas the trends of workability showed an increase with cement replacement. Compressive strength increased at lower percentage replacements however the flexural and tensile strength increased till 15% SBR addition after which it decreased. The total porosity in terms of water absorption decreased which makes SBR modified concrete feasible for concretes exposed to moist conditions and the decreased porosity would increase its durability against chloride induced corrosion.

scholarly journals Mechanical Properties of Water Purification Industry Used Natural Rubber/Styrene-Butadiene Rubber Blends that Prepared Via Different Sulfur Curing Systems

2020 ◽  
Author(s):  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Relative Volume ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends ◽  
Styrene Butadiene

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

scholarly journals Enhancing the Compressive Strength and Density of Cement Mortar by the Addition of Different Alignments of Glass Fibers and Styrene Butadiene Rubber

2017 ◽  
Vol 13 (3) ◽  
pp. 108-119
Author(s):  
Mustafa M. Hamza ◽  
Besma M. Fahad
Keyword(s):  
Compressive Strength ◽  
Glass Fiber ◽  
Glass Fibers ◽  
Control Sample ◽  
Styrene Butadiene Rubber ◽  
Hydration Reaction ◽  
Butadiene Rubber ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced ◽  
Styrene Butadiene

Abstract In the field of construction materials the glass reinforced mortar and Styrene Butadiene mortar are modern composite materials. This study experimentally investigated the effect of addition of randomly dispersed glass fibers and layered glass fibers on density and compressive strength of mortar with and without the presence of Styrene Butadiene Rubber (SBR). Mixtures of 1:2 cement/sand ratio and 0.5 water/cement ratio were prepared for making mortar. The glass fibers were added by two manners, layers and random with weight percentages of (0.54, 0.76, 1.1 and 1.42). The specimens were divided into two series: glass-fiber reinforced mortar without SBR and glass-fiber reinforced mortar with 7% SBR of mixture water. All specimens were tested after curing for 7 and 28 days, glass-fiber reinforced mortar exhibited better properties than control mortar in improvement of compressive strength and lowering the density after curing for 28 days due to the completion of cement hydration reaction.. For compressive strength the best results were achieved with 1.42 wt.% layers glass-fiber reinforced mortar with 7% SBR which gave 41.56 MPa. On the other hand, the addition of 1.42 wt.% random glass-fiber without SBR addition caused the beast reduction in density by 10.6% and produced lighter structure than control sample. Keywords: Random glass fibers , Glass fibers layers, SBR, compressive strength, density.  

scholarly journals Innovative Husk-Crete Building Materials from Rice Chaff and Modified Cement Mortars

2020 ◽  
Vol 23 (2) ◽  
pp. 67-72
Author(s):  
Banjo Akinyemi ◽  
Temidayo E. Omoniyi ◽  
Olugbenga Elemile ◽  
Oluwafemi Arowofila
Keyword(s):  
Building Material ◽  
Building Materials ◽  
Agricultural Waste ◽  
Styrene Butadiene Rubber ◽  
Cement Matrix ◽  
Butadiene Rubber ◽  
Matrix System ◽  
Split Tensile Strength ◽  
Cement Mortars ◽  
Styrene Butadiene

AbstractThe study considers the use of rice chaffs (husks) as an aggregate in a composite cement matrix system. Cement mortars were modified using styrene butadiene rubber polymer for strengthening. The goal is to develop a lightweight building material with good thermal insulation properties out of agricultural waste. The compressive strength, split tensile strength and flexural strength were experimentally evaluated. Further analyses of the samples were carried out by means of scanning electron microscope and energy dispersive spectroscopy. The key results obtained were presented and analysed with the performance of the proposed husk-crete building material showing adequate properties essential for a lightweight structural material with possible applications for non-structural purposes.

scholarly journals Mechanical Properties of Water Purification Industry Used Natural Rubber/Styrene-Butadiene Rubber Blends that Prepared Via Different Sulfur Curing Systems

2020 ◽  
Author(s):  
Ruogu Tang
Keyword(s):  
Mechanical Properties ◽  
Relative Volume ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Water Industry ◽  
High Modulus ◽  
Elongation At Break ◽  
Tear Strength ◽  
Rubber Blends ◽  
Styrene Butadiene

<div>The water industry used NR was selected for blending with SBR. A series of NR/SBR vulcanizates were prepared through three different vulcanization systems, conventional vulcanization (CV), effective vulcanization (EV) and semi-effective vulcanization (SEV) respectively, basing on each formulation and optimum curing time. We examined the mechanical properties of NR/SBR vulcanizates including tensile strength, tear strength, elongation at break, modulus, Shore A hardnessand and relative volume abrasion. The results indicated that NR/SBR vulcanizates prepared in different systems differed in mechanical properties. Vulcanizates prepared via CV showed higher tensile and tear strength; vulcanizates prepared via EV had high modulus and hardness, and vulcanizates prepared via SEV performed high abrasion resistance. </div>

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