Influence of admixtures on the performance of soundless chemical demolition agents and implications for their utilization

IF 0.7 Q4 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Journal of Sustainable Mining Pub Date : 2022-06-22 DOI:10.46873/2300-3960.1350
Nattamon Maneenoi, R. Bissen, S. Chawchai
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Abstract

Soundless Chemical Demolition Agents (SCDAs) are an environmentally friendly and safer alternative to traditional rock fragmentation methods. Admixtures are used to change the rheological properties and performance of SCDAs. This study aimed to investigate the effect of various concentrations of chemical accelerators (chloride salts) and viscosity enhancing agents (VEAs: Xanthan gum, Guar gum, and Gellan gum) on the fracture onset compared to an unmodified SCDA (BRISTAR 100®). All experiments were conducted on Portland Type 1 (OPC 1) cement blocks. The flowability of the mixtures was determined by mini-slump tests. Results show that 4wt% MgCl2 and 3wt% CaCl2 have accelerated the fracture onset by 47.4% and 61.2%, respectively. VEAs have a decelerating effect, which is mitigated by the addition of the aforementioned chloride salts. Combining 4wt% MgCl2 with 0.2wt% Xanthan gum reduced the fracture onset time by 66.8%. A cost analysis shows that the initial price of the SCDA mainly determines a potential cost reduction by using admixtures. For a low-cost SCDA, the focus is likely to shift to saving time. This study can serve as a basis for future studies to further improve performance and cost as well as diversify the range of applications for SCDAs.
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外加剂对无声化学爆破剂性能的影响及其应用意义
无声化学爆破剂(SCDAs)是传统岩石破碎方法的一种环保且安全的替代方法。外加剂用于改变scda的流变性能和性能。本研究旨在研究不同浓度的化学促进剂(氯盐)和黏度增强剂(VEAs:黄原胶、瓜尔胶和结冷胶)与未改性SCDA (BRISTAR 100®)相比对骨折发生的影响。所有实验均在Portland Type 1 (opc1)水泥砌块上进行。通过微坍落度试验确定了混合物的流动性。结果表明,4wt% MgCl2和3wt% CaCl2分别使断裂发生加速47.4%和61.2%。vea具有减速作用,通过添加上述氯化物盐可以减轻减速作用。4wt% MgCl2和0.2wt%黄原胶的组合可使断裂发生时间缩短66.8%。成本分析表明,SCDA的初始价格主要决定了外加剂的潜在成本降低。对于低成本的SCDA,重点可能转向节省时间。该研究可为进一步提高scda的性能和成本以及拓宽其应用范围奠定基础。
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来源期刊
Journal of Sustainable Mining
Journal of Sustainable Mining Earth and Planetary Sciences-Geology
CiteScore
1.50
自引率
10.00%
发文量
20
审稿时长
16 weeks
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