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于海洋^1,3，钱宏德²，刘东基^1,3，张艳佳^1,3

（1.河北省建筑科学研究院有限公司，河北 石家庄，050227；

2.涞源县奥威矿业投资有限公司，河北 保定，074300；

3.河北省固废建材化利用科学与技术重点实验室，河北 石家庄，050227）

摘 要：利用涞源地区矽卡岩尾矿废石制备机制砂，分析了其母岩的岩相和矿物组成，测定了机制砂石粉的主要成分。对比石灰岩机制砂，研究了机制砂片状颗粒含量、石粉含量对C30、C50混凝土工作性能、力学性能和耐久性能的影响。结果表明：片状颗粒和石粉含量的提高均会使机制砂混凝土的工作性能和强度降低；相比于石灰岩机制砂，当片状颗粒相同时，矽卡岩机制砂混凝土强度更高；石粉含量小于8%时，矽卡岩机制砂混凝土的强度较高；对于C30矽卡岩机制砂混凝土，片状颗粒含量的提高会使混凝土的耐久性变差，但一定量的石粉对抗渗、抗冻以及抗氯离子渗透性能具有一定的改善效果。

关键词: 矽卡岩；机制砂；片状颗粒；石粉含量；混凝土性能

中图分类号：TU528      

文献标志码：A       

文章编号：1005-8249（2024）02-0006-05

DOI：10.19860/j.cnki.issn1005-8249.2024.02.002

     

YU haiyang1,3，QIAN Hongde2，LIU Dongji1,3，ZHANG Yanjia1,3

（1. HeBei Academy of Building Research, Shijiazhuang 050227,China；

2. Laiyuan County Orway Mining Investment Co., Ltd.,Baoding 074300,China

3. HeBei Province Science and Technology Key Laboratory of Solid Waste for Building Materials, Shijiazhuang 050227,China；）

Abstract：The siliceous manufactured sand was prepared from the waste rock of skarn tailings in Laiyuan area. The lithofacies and mineral composition of tailings waste rock parent rock were analyzed, and the main performance indexes of the manufactured sand and the main components of the stone powder were determined. Compared with the limestone manufactured sand, the effects of the flake particle content and the stone powder content of the manufactured sand on the working performance, mechanical properties and durability of concrete were studied. The results show that: The increase of flake particles and powder content reduces the workability and strength of the skarn manufactured sand concrete and the limestone manufactured sand concrete. Compared with limestone machine-made sand, when the flaky particles are the same, the strength of skarn machine-made sand concrete is higher. When the powder content is less than 8 %, the strength of the skarn manufactured sand concrete is higher. For the C30 skarn manufactured sand concrete, the increase of flake particles content will deteriorate the durability of the concrete, but a certain amount of powder has a certain improvement effect on the impermeability, frost resistance and chloride ion permeability resistance.

Keywords：skarn；manufactured sand；flake particles；stone powder content；performance of concrete

*基金项目：河北省重点研发计划项目资源与环境专项资助项目（20373801D），石家庄市科技计划项目（226160507A）。

作者简介：于海洋（1991—），男，硕士，工程师，主要研究方向：固废尾矿资源化利用、建筑垃圾资源化利用等方面研究。

通信作者：刘东基（1993—），男，硕士，工程师，主要研究方向：固废尾矿资源化利用、高品质机制砂石等方面研究。

收稿日期：2023-11-15