STUDY OF THE EFFECT OF THE USE OF ADDITIONAL ADDITIVES DAMDEX AND BESTMITTEL ON THE COMPRESSIVE STRENGTH OF CONCRETE f'c 20 MPa.

Dina Heldita
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Abstract

Under normal circumstances, the maximum strength of the concrete will be reached at the age of 28 days, but to achieve the initial maximum strength of the concrete can be done in 2 ways, namely the use of Portland cement or the use of mineral additives or chemical admixtures. Another purpose of the use of admixture is the fulfillment of a short concrete execution time but the performance of the concrete is maintained.This study aims to determine the comparison of the compressive strength (N/mm2 unit) of normal concrete with concrete that uses Damdex and Bestmittel added materials, the test object used is cylindrical with the percentage addition of Damdex 2% and Bestmittel 0.2% of the weight of cement with composition the mixture used using the Job Mix Formula f'c 20 MPa for the Block B/F Heavy Rehab work project, Kotabaru District Prosperity Market Complex, namely for 1 m3 using 442.00 kg of cement, 681.79 kg of fine aggregate, 1065.72 kg of coarse aggregate , 215 liters of water. With the age of the tested concrete the compressive strength is 14 and 28 days.The results of the normal concrete compressive strength test at 14 and 28 days on average were 20.33 MPa and 22.19 MPa from the design compressive strength (f'c) of 20 MPa. Meanwhile, for the mixture with 2% Damdex and Bestmittel 0.2% added materials at 14 and 28 days the average was 22.93 MPa and 20.76 MPa from the design compressive strength (f'c) 20 MPa..Keywords: Concrete Quality, Damdex, Bestmittel, Compressive Strength
掺加DAMDEX和BESTMITTEL对20mpa以下混凝土抗压强度影响的研究。
一般情况下,混凝土在龄期28天会达到最大强度,但要达到混凝土的初始最大强度可通过2种方式完成,即使用波特兰水泥或使用矿物添加剂或化学外加剂。使用外加剂的另一个目的是在保持混凝土性能的前提下,缩短混凝土的施工时间。本研究旨在确定抗压强度的比较(N /平方毫米单位)的普通混凝土和混凝土使用Damdex Bestmittel添加材料,使用的测试对象是圆柱形添加Damdex比例2%,Bestmittel 0.2%的水泥的重量组成混合物的使用现场拌合配方'c 20 MPa块B / f重康复工作项目,Kotabaru地区繁荣市场复杂,即1立方米使用水泥442.00公斤,681.79千克细骨料,1065.72千克粗骨料,215升水。试件抗压强度随龄期的变化分别为14天和28天。正常混凝土抗压强度试验结果在14和28天平均为20.33 MPa和22.19 MPa,设计抗压强度(f'c)为20 MPa。同时,掺量为2% Damdex和0.2% Bestmittel的混合料在14和28天的抗压强度平均值分别为22.93 MPa和20.76 MPa,比设计抗压强度(f'c)为20 MPa。关键词:混凝土质量,Damdex, Bestmittel,抗压强度
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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