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于海洋^1,3，錢宏德²，劉東基^1,3，張艷佳^1,3

（1.河北省建筑科學研究院有限公司，河北 石家莊，050227；

2.淶源縣奧威礦業投資有限公司，河北 保定，074300；

3.河北省固廢建材化利用科學與技術重點實驗室，河北 石家莊，050227）

摘 要：利用淶源地區矽卡巖尾礦廢石制備機制砂，分析了其母巖的巖相和礦物組成，測定了機制砂石粉的主要成分。對比石灰巖機制砂，研究了機制砂片狀顆粒含量、石粉含量對C30、C50混凝土工作性能、力學性能和耐久性能的影響。結果表明：片狀顆粒和石粉含量的提高均會使機制砂混凝土的工作性能和強度降低；相比于石灰巖機制砂，當片狀顆粒相同時，矽卡巖機制砂混凝土強度更高；石粉含量小于8%時，矽卡巖機制砂混凝土的強度較高；對于C30矽卡巖機制砂混凝土，片狀顆粒含量的提高會使混凝土的耐久性變差，但一定量的石粉對抗滲、抗凍以及抗氯離子滲透性能具有一定的改善效果。

關鍵詞: 矽卡巖；機制砂；片狀顆粒；石粉含量；混凝土性能

中圖分類號：TU528      

文獻標志碼：A       

文章編號：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

*基金項目：河北省重點研發計劃項目資源與環境專項資助項目（20373801D），石家莊市科技計劃項目（226160507A）。

作者簡介：于海洋（1991—），男，碩士，工程師，主要研究方向：固廢尾礦資源化利用、建筑垃圾資源化利用等方面研究。

通信作者：劉東基（1993—），男，碩士，工程師，主要研究方向：固廢尾礦資源化利用、高品質機制砂石等方面研究。

收稿日期：2023-11-15