بعــض خــواص الكــتل الخرســانية المجوفــة المصــنعة من الخرســـانة البوليميريــة الخاليــة من الركـــام الناعــــم

Abstract

No-fines hollow concrete blocks using the 10-mm maximum size of aggregate and improved by Styrene Butadiene Rubber (SBR) polymer is manufactured in one of Al-Anbar governorate blocks factory. The concrete mixes, by weight, were (1:5) and (1:6) (cement: aggregate). The polymer was added as percentages of cement weight in 3%, 6%, and 10%. The following tests are used in this study: Compressive strength, density, absorption, and compressive strength after exposure to high temperature. The tests results were compared with the corresponding results of normal blocks which made in the block factory with (1:2:4) (cement: sand: gravel) by weight mix. Results also proved that the addition of polymer leads to improvement of block properties like compressive strength and compressive strength after exposure to high temperatures. The maximum increase in compressive strength according to blocks made by reference mix was (12.69%) in (41) day-test age for blocks with mix proportion by weight equal to (1:5) (cement: agg.) with (6%) (polymer: cement) ratio and for the same blocks, the percentages of increasing equal to (132%) according to blocks factory. This addition also leads to an increase in the density of blocks and a decrease in water absorption. However, for high SBR content (10%), the traditional method of block production is not adequate for no-fines polymer concrete blocks.