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高温粉磨处理砒砂岩改性材料的性能
作者:李长明1?2?管俊峰2??慧1?曹亚莉1?姚文艺1?王立久3?
单位:(1.?水利部黄土高原水土流失过程与控制重点实验室?郑州?450003?2.?华北水利水电大学土木与交通学院?郑州?450045?3.?大连理工大学土木工程学院?辽宁?大连?116024)?
关键词:砒砂岩?热处理?矿物活性?改性材料?性能?
分类号:TV41
出版年,卷(期):页码:2019,47(8):0-0
DOI:
摘要:

?研究了高温和机械粉磨处理对砒砂岩结构及改性材料性能的影响,以煅烧温度、改性剂用量和养护龄期为变量,通过抗压强度、X射线衍射、压汞、热重-差热测试和扫描电子显微镜分析,对砒砂岩改性材料的力学强度、矿物组成、反应产物类型及微观结构等进行了研究。结果表明:煅烧破坏了砒砂中黏土矿物的结构,促使碳酸盐分解。高温和机械粉磨处理使试件强度显着提高,改性材料(水玻璃改性) 90 d龄期抗压强度最高达22 MPa,为原试件强度的417%,砒砂岩较合理的煅烧温度为600 ℃。砒砂岩改性材料的反应产物主要为碱金属凝胶和水化铝硅酸钙凝胶。

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基金项目:
国家重点研发计划(2017YFC0504503);国家自然科学基金(51708216,51779095,51809109);水利部黄土高原水土流失过程与控制重点实验室开放基金(201802);河南省高等学校重点科研项目(18A570001);河南省科技攻关计划(192102310223)。
作者简介:
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