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To know the technology about alternative building materials, #sandcement blocks, aerated concrete #ferrocement technology. #ecofriendly constriction m
EFFECT OF HIGH RANGE WATER REDUCING (HRWR) SUPER PLASTICIZER ON COMPRESSIVE STRENGTH OF SAND CEMENT SOLID BLOCK
The experiments were conducted at Housing and Building Research Institute, Dhaka, Bangladesh during 2020. Wastage and unused dredged sand turn into national wealth it is properly utilized. The goal of this study is to use dredging sand as raw materials for producing eco-friendly Sand Cement Solid block. Along with a small ratio of Portland composite cement (16-28) % and a negligible amount of superplasticizer, 200 ml by weight of Cement have been used. In this study, the effect of single-use of high range of superplasticizer and the effect of water-cement ratios of sand cement block were determined. The Water Cement ratios were maintained for this block are (0.25-0.28). These blocks were cured by spraying water on the specimens three times daily for 7, 14 and 28 days to observe the ultimate compressive strength, water absorption, and efflorescence test of blocks. The test results showed these for the optimum water-cement ratios and optimum dosage of superplasticizer increased (66.07%) in compressive strength than that of normal and other concrete block mix. However Compressive strength were improved by dosage of 200 ml super plasticizer per bag of cement after 28 days curing is increasing compressive strength 9430 psi (65.03MPa) which is higher than that of normal concrete. From the perspective of cost and benefit, we have calculated that it outright cost-effective and the environment gets the enormous benefit. This new, effective idea and solution can certainly lessen the problem of dredging sediment disposal and produce eco-friendly construction materials.
EPH International Journal Of Chemical And Pharmaceutical Research STUDY ON THE PERFORMANCE OF ADMIXTURE AND SYNTHETIC POLYMER FIBER IN CONCRETE
This paper inspect on exploring the effects of using fiber and admixture in the mechanical properties of the strength of concrete of different grades. The primary concern of this study is to establish the divergence in the strength properties of M20, M25 and M30 concrete with addition of admixture and polymer fiber. Based on the compressive strength of fifty four tested cylinders, the results show that the addition of admixture and polymer fiber both give higher strengths more than that of the reference concrete which largely can be used to reduce the percentage of cement.
Effect of stone dust on the mechanical properties of adobe brick
Ecologic building materials such as adobe bricks have become of greater economic importance in recent years. Adobe is a form of natural architecture built with environment friendly materials which provide indoor protection from outside temperature conditions. In Bangladesh, adobe brick is getting more popularity as an economical housing material. It is important to consider the strength of adobe brick. This study was conducted to determine the effect of the proportion between the soil and the stabilizers (such as cement and stone dust) on stabilized earth blocks durability. As the experimental program was planned, consisting tests such as density, compressive strength and flexural strength, were conducted to investigate the properties of adobe bricks. The specimens incorporated with different volume fractions of stone dust, i.e. 5%, 10%, 15%, 20% and 25% and the result showed that the use of stone dust increases the compressive strength 10% to 20 % respectively and the moisture content and water absorption of the adobe from dredge soil and cement and stone dust also calculated which was very similar and slightly change with the percentage of stone dust. The results indicate that the use of stone dust of 910 % to 20 %) with 5% cement based adobe enhances the mechanical properties of the adobe and optimization of the stone dust is required to get the best performance.
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