Djunaidi, Djunaidi (2023) Pengaruh Bahan Tambah Plastiment-vz Dansuhu Agregat Kasar Terhadap Kekuatan Beton Mutu Sedang Untuk Konstruksi Jalan. Masters thesis, Universitas Islam Riau.

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Abstract

EFFECT OF PLASTIMENT-VZ ADDITIVES AND COARSE AGGREGATE TEMPERATURE ON THE STRENGTH OF MEDIUM QUALITY CONCRETE FOR ROAD CONSTRUCTION Djunaidi NPM: 203121009 Based on the environmental temperature problems that often occur in the field, it is necessary to carry out research that aims to determine the results of the compressive strength test and flexural strength test of medium quality concrete (20? fc'<45Mpa) as a result of coarse aggregates reaching temperatures of 25 C and 45 0 C without additives. added and mixed with Plastiment-VZ with levels of 0.4%, 0.6%, 1.0%, 1.2% so as to determine the compressive strength and flexural strength of concrete which represent the effect of temperature and Plastiment-VZ added ingredients. The test method in the laboratory regarding the effect of Plastiment-VZ additives with mixed variations of 0.4%, 0.6%, 1.0%, 1.2% and coarse aggregate when the temperature reaches 25 0 C, 30 0 C and 45 0 C on compressive strength and concrete flexural strength with fc' design concrete quality of 30 MPa with a concrete mixture of coarse aggregate (Telang Island quarry), fine aggregate (Kijang quarry), water (bore well), and PCC cement (Semen Padang). From the results of the flexural strength (fs') and compressive strength (fc') tests using coarse aggregate at temperatures of 25 0 C, 30 0 C and 45 C it can be concluded that the higher the temperature of the coarse aggregate in the concrete mixture, the greater the quality of the concrete in flexural strength (fs') and compressive strength. (fc') tends to be lower. The effect of using variations in the content of Plastiment-VZ added material on flexural strength (fs') and compressive strength (fc') as a concrete mixture, namely the higher the content of Plastiment-VZ added material, the quality of the concrete tends to be lower. In line with this, the concrete mix with Plastiment-VZ added material with an aggregate temperature of 45 0 C has lower flexural strength (fs') and compressive strength (fc') concrete compared to concrete using Plastiment-VZ added material at an aggregate temperature of 25 0 C and for the effect of Plastiment-VZ on concrete quality, namely the use of Plastiment-VZ additives does not increase the quality of concrete, either flexural strength or compressive strength at 28 days of age, but only increases workability and can cover cavities in concrete, making it easier to carry out concrete work.

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