Studi Kuat Tekan & Setting Time Beton dengan Variasi Dosis Admixture Tipe D

Abstract

Various research and experiments in the field of concrete is done as an effort to improve the quality of concrete, One of them to improve the quality of concrete is added admixture type D-retarder. It is expected that the results of these experiments and experiments are able to answer the higher demands in the foundry implementation which sometimes takes a long time. The purpose of this study was to investigate the effect of Type D dosage admixture on moderate quality concrete fc30, the dose of this study was 0%, 0.35%, 0.75%, 1.10% of sementitious weight. The test used is a compressive strength to determine the quality of fc30 while setting time to find the initial time of sett. which is used as parameter parameter does not occur cold joint. The result showed that experiment 1 as the parameter that is design without admixture type D-VZ, dose 0,00%, compressive strength 28 days 33,13 Mpa, experiment 2 dose 0,35%, compressive strength up 10% from experiment 1, 3 dose experiments 0.75%, a compressive strength rose 6% from experiment 1, experiments 4 doses 1.10%, a compressive strength down 4% from experiment 1. As for the D-VZ admixture dosage and addition dose, concrete deceleration deceleration, D-VZ type non-admixture concrete parameter, 1 dose 0,00% experiment resulted in initial sett 127 minutes, 2 dose experiment 0.35%, resulted in initial sett 267 minutes , experiment 3 dose 0.75%, resulted in initial sett 933 minutes, experiment 4 dose 1.10%, resulted in initial sett 2520 minutes. Expected from this research, can be used as a reference for Project Supervisor, Contractor, Readymix Supplier, especially for concrete over dose (= long concrete setting), which can be maintained with the reference of strong compressive strength achieved, so that the concrete loong setting on the structure is not in Demolish (= slash). And will be used as a handle if it requires deceleration concrete can be added admixture type D.