EFFICACY OF NANO SUPPLEMENTARY CEMENTITIOUS MATERIALS ON MECHANICAL PROPERTIES OF LOW DENSITY FOAMED CONCRETE

IF 0.2 Q4 MULTIDISCIPLINARY SCIENCES Suranaree Journal of Science and Technology Pub Date : 2023-10-09 DOI:10.55766/sujst-2023-04-e0958
Yogesh Tambe, Pravin Nemade
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Abstract

Low density foamed concrete (LDFC) serves as an effective construction material with structural and thermal characteristics. This study reports results of experimental investigations on mechanical properties of LDFC including, thermal conductivity and drying shrinkage. Three different densities ±800, ±1000 and ±1300 kg/m3, were made with two cementitious additives like Nano-GGBS and Nano-RHA in LDFC matrix in the form of SCM. The aim of this study is to investigate the effects of various percentages of SCM on compressive strength, split tensile strength, flexural strength, thermal conductivity and drying shrinkage up to 28 days on LDFC specimens. The experimental outcomes consistently represents that the 28 days mechanical strengths, thermal conductivity and drying shrinkage increased with increasing percentage of Nano-GGBS and Nano-RHA. The 10% replacement of SCM of both the materials shows good agreement on the performance of LDFC. The split-tensile strength and flexural strength attains in the range of 19–21% and 33–46% related with 28 days compressive strength. The thermal insulation and drying shrinkage of LDFC specimens reduced with the increased density. The purpose of this research to assess the efficacy of Nano-GGBS and Nano-RHA as a SCM considering aspects of economical and sustainable concrete in LDFC matrix. It is observed that, with increase in SCM percentages, the shrinkage strain increases with testing age. The drying shrinkage of LDFC specimens reduces with density. Overall, the 10% addition of Nano-GGBS and Nano-RHA as filler in LDFC production minimizes the load on consumption of natural resources, CO2 emissions and achieves economy.
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纳米补充胶凝材料对低密度泡沫混凝土力学性能的影响
低密度泡沫混凝土(LDFC)是一种具有结构和热特性的有效建筑材料。本研究报告了LDFC的力学性能,包括热导率和干燥收缩率的实验研究结果。采用纳米ggbs和纳米rha两种胶凝剂,在LDFC基质中以SCM的形式制备了密度分别为±800、±1000和±1300 kg/m3的三种不同的胶凝材料。本研究的目的是研究不同比例的SCM对LDFC试件抗压强度、劈裂抗拉强度、抗弯强度、导热系数和28天干燥收缩率的影响。实验结果一致表明,随着纳米ggbs和纳米rha含量的增加,28天机械强度、导热系数和干燥收缩率均有所提高。将两种材料的SCM替换10%,LDFC的性能表现出良好的一致性。劈裂抗拉强度和抗弯强度在28 d抗压强度的19 ~ 21%和33 ~ 46%之间。随着密度的增加,LDFC试样的绝热性能和干燥收缩率降低。本研究的目的是评估纳米- ggbs和纳米- rha作为SCM的有效性,考虑到LDFC基质中混凝土的经济性和可持续性。观察到,随着SCM比例的增加,收缩应变随试验龄期的增加而增加。LDFC试样的干燥收缩率随密度的增大而减小。总体而言,在LDFC生产中添加10%的纳米- ggbs和纳米- rha作为填料,可以最大限度地减少自然资源消耗和二氧化碳排放,实现经济效益。
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来源期刊
Suranaree Journal of Science and Technology
Suranaree Journal of Science and Technology MULTIDISCIPLINARY SCIENCES-
CiteScore
0.30
自引率
50.00%
发文量
0
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