AN INNOVATION OF HIGH PERFORMANCE CONCRETE BY REPLACING CEMENT WITH NICKEL SLAG POWDER

International Journal on Livable Space Pub Date : 2019-09-20 DOI:10.25105/LIVAS.V4I2.5602

Bunga Yubi Nabiilah, Lisa Oksri Nelfia, S. Astutiningsih

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引用次数: 1

Abstract

ABSTRACT Nickel slag is a solid waste produced from the nickel smelting process. At present, In Indonesia, the total capacity of domestic nickel smelting reaches 5 million tons/year with the assumption of NPI or FeNi production with a Ni level of 10%, requiring the input of Ni ore raw materials around 40 million tons/year in which around 30 million tons will become waste/slag. Currently, the area of Southeast Sulawesi has a potential of huge nickel resources of 97.4 billion tons, which spread over 480 thousand hectares of land. This has led to a continuous increase in the demand of concrete towards infrastructural development in Indonesia. Therefore, the aim of this research is to reuse nickel slag powder in the context of environmentaly friendly by analyzing the tensile strength using nickel slag powder (NSP) as a cement substitution material for the manufacture of high-performance concrete. Specimens were made with water-cement ratio of 0.31 and compared with 100% OPC Type 1 cement (as reference). Furthermore, the NSP substitution of cement were 5%, 10%, 15%, 20%, 25% and 30% with a concrete age of 3, 7, 14 and 28 days. Analysis of physical characteristics of nickel slag powder and cement were carried out by using the Le Chatelier method, while the mechanical characteristics comprised ease of work in the field (workability) and split tensile strength. The manufactured concrete was made by using Sika Viscocrete 8015 superplasticizer admixture with split tensile strength test results for NSP substitution at 28 days ≥ 5% of the value of compressive strength. Keywords: High-performance concrete, Nickel slag powder, Split tensile strength,

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用镍渣粉代替水泥的高性能混凝土创新

镍渣是镍冶炼过程中产生的固体废弃物。目前，印尼国内镍冶炼总产能达到500万吨/年，假设镍含量为10%的NPI或FeNi产量，需要输入约4000万吨/年的镍矿原料，其中约3000万吨将成为废/渣。目前，苏拉威西东南地区镍资源潜力巨大，储量达974亿吨，分布在48万公顷土地上。这导致印度尼西亚基础设施发展对混凝土的需求不断增加。因此，本研究的目的是通过分析镍渣粉(NSP)作为水泥替代材料制造高性能混凝土的抗拉强度，从而在环保的背景下对镍渣粉进行再利用。水灰比为0.31时制作试件，与100% OPC 1型水泥对比(作为参考)。水泥的NSP替代量分别为5%、10%、15%、20%、25%和30%，混凝土龄期分别为3、7、14和28天。采用勒夏特列法对镍渣粉和水泥的物理特性进行了分析，力学特性包括现场易作工性(和易性)和劈裂抗拉强度。采用西卡粘混凝土8015型高效减水剂掺合料配制混凝土，采用NSP替代28天抗压强度≥5%的劈裂抗拉强度试验结果。关键词:高性能混凝土;镍渣粉;劈裂抗拉强度;

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International Journal on Livable Space

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