用于现场应用的含碱-硫酸盐活化剂的无水泥复合材料的性能评估。

Performance Evaluation of Cementless Composites with Alkali-Sulfate Activator for Field Application.

作者信息

Lee Jaehyun, Lee Taegyu, Lee Seungwoo, Choi Hyeonggil

机构信息

Department of Safety Engineering, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea.

Department of Fire and Disaster Prevention, Semyung University, 65 Semyung-ro, Jecheon-si, Chungbuk 27136, Korea.

出版信息

Materials (Basel). 2020 Nov 27;13(23):5410. doi: 10.3390/ma13235410.

DOI:10.3390/ma13235410

PMID:33261202

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7729586/

Abstract

This study analyzed the performance evaluation of alkali-activated composites (AAC) with an alkali-sulfate activator and determined the expected effects of applying AACs to actual sites. Results revealed that when the binder weight was increased by 100 kg/m at 7 days of age, the homogel strength of ordinary Portland cement (OPC) and AAC increased by 0.9 and 5.0 MPa, respectively. According to the analysis of the matrix microstructures at 7 days of age, calcium silicate hydrates (C-S-H, CaSiO·HO) and ettringite (CaAl(SO)(OH)·26HO) were formed in AAC, which are similar hydration products as found in OPC. Furthermore, the acid resistance analysis showed that the mass change of AAC in HCl and HSO solutions ranged from 36.1% to 88.0%, lower than that of OPC, indicating AAC's superior acid resistance. Moreover, the OPC and AAC binder weight ranges satisfying the target geltime (20-50 s) were estimated as 180.1-471.1 kg/m and 261.2-469.9 kg/m, respectively, and the global warming potential (GWP) according to binder weight range was 102.3-257.3 kg CO eq/m and 72.9-126.0 kg CO eq/m. Therefore, by applying AAC to actual sites, GWP is expected to be 29.5 (28.8%)-131.3 (51.0%) kg CO eq/m less than that of OPC.

摘要

本研究分析了使用碱 - 硫酸盐活化剂的碱激发复合材料（AAC）的性能评估，并确定了将AAC应用于实际场地的预期效果。结果表明，在7日龄时，当粘结剂重量每立方米增加100 kg时，普通硅酸盐水泥（OPC）和AAC的匀质凝胶强度分别增加0.9 MPa和5.0 MPa。根据对7日龄时基体微观结构的分析，AAC中形成了硅酸钙水合物（C - S - H，CaSiO·HO）和钙矾石（CaAl(SO)(OH)·26HO），它们是与OPC中发现的类似的水化产物。此外，耐酸性分析表明，AAC在HCl和HSO溶液中的质量变化范围为36.1%至88.0%，低于OPC，表明AAC具有优异的耐酸性。此外，满足目标凝胶时间（20 - 50 s）的OPC和AAC粘结剂重量范围分别估计为180.1 - 471.1 kg/m和261.2 - 469.9 kg/m，根据粘结剂重量范围的全球变暖潜能值（GWP）分别为102.3 - 257.3 kg CO₂eq/m和72.9 - 126.0 kg CO₂eq/m。因此，通过将AAC应用于实际场地，预计GWP比OPC少29.5（28.8%） - 131.3（51.0%）kg CO₂eq/m。