Stress Strain Relationship of Polymer Modified No-Fine Concrete

Abstract

AbstractThe use of no fines concrete in construction increased especially during and after 1970s. New concrete is obtained from no-fines concrete in this research by adding Styrene Butadiene Rubber (SBR) Polymer as a ratio of cement content.This research includes the study of the effect of SBR polymer on stress-strain relationship of concrete under compression.The concrete mixes by weight were (1:7, 1:6, 1:5, and 1:4) cement / aggregate (C/A). The polymer was added as percentages by weight of cement as (5, 7.5 and 10%). Rreference mixes were made for every case.A new mathematical model for both ascending and descending portions is suggested in this research and discussed. The area under the stress strain curve was found in polymer modified no-fines concrete to be greater than reference concrete and was increased with polymer / cement ratios (P/C).The suitability of no fine polymer concrete to be used in structural members has been affirmed in this research especially for (1:4 and 1:5) C/A polymer mix.