The effect on concrete behaviour using 20 % and 30 % of latex admixture / Zainal Abiddin Hasan

The aim of this investigation is to study the effect on concrete behaviour with using 20 % and 30 % of latex admixture, such as tensile strength, compressive strength, workability and permeability as well as durability. This study is a continuation of final year project done by Nurhaidah Jamil which used dosages of 0 % & 10 % of latex to analyse the effect of latex admixture on concrete characteristic. In the process of the experiment, latex dosage of 20 % and 30 % will be added to the mix samples. Concrete grade of 20 N/mm2, 25 N/mm2, 30 N/mm2, 35 N/mm2 and 40 N/mm2 will be used. The testings will be carried out at after 28 days of curing with fully immersed in water. Based on the past researchs, the testing cannot be carried out at 3 days because retardation of set due to the tatex admixture. Then a comparison between percentage (%) of dosages is being studied to the different proportion and characteristic strength of concrete. From the results obtained, it is found that compressive strength and tensile strength of cubes decreases with an increase in amount of rubber latex content for all cases of concrete grade compared to control mix which done by Nurhaidah Jamil and Mohd. Ztikri Senik in their final year project report. But the addition of rubber latex gives improvements in workability and caused decreasing in the permeabilty.