LIU Jialiang1, JIANG Ruishuang2,3, XIN Chongsheng4, GUO Baolin2,3, XING Youjia4, LI Fei1
(1.School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;2.Shandong Transportation Institute, Jinan 250031, China; 3.Shandong Engineering Laboratory of Bridge and Tunnel Performance Evaluation and Durability Promotion, Jinan 250031, China;4.Jinan Kingyine Highway Engineering Co., Ltd., Jinan 250101, China)
Abstract：Granite manufactured sand used as concrete aggregate is one of the important ways to alleviate the shortage of river sand resources. In order to study the influence of high adsorption granite manufactured sand on concrete performance, the properties of granite powder were characterized by X-ray fluorescence spectroscopy (XRF), diffraction of X-ray(XRD), scanning electron microscopy (SEM), polarizing microscope(PM) and total organic carbon analyzer (TOC-L). Two different types of sand, granite manufactured sand, limestone manufactured sand and river sand, were carried out to prepare concrete and their performance comparison tests. The effects of granite manufactured sand and stone powder content on workability, mechanical properties and drying shrinkage properties of concrete were investigated. The results show that different types of sand have a significant impact on the workability of concrete, and when the mixture ratio and slump of concrete are the same, the dosage of water reducing agent(mass ratio of water reducing agent to cementing material when preparing concrete)of granite manufactured sand concrete increases by 64.3%, and the 28 d compressive strength decreases by 15.2%, and the dry shrinkage of concrete at 120 d increases by 7.6% compared with limestone manufactured sand group. The workability, compressive strength and dry shrinkage properties of concrete are optimized when the mass fraction of stone powder is controlled at 3%～7% in granite manufactured sand gradation.
Keywords：granite manufactured sand concrete; concrete performance; absorbability; methylene blue value
Get Citation：LIU J L, JIANG R S, XIN C S, et al. Effect of high adsorption granite manufactured sand on concrete properties[J]. China Powder Science and Technology, 2023, 29(5): 81-91.
DOI：10.13732/j.issn.1008-5548.2023.05.010
Received：2023-05-10,Revised：2023-07-24,Online：2023-08-29 13：42。
Funding Project：国家重点研发计划项目,编号:2022YFC3803404。
First Author：刘嘉良(1997—),男,硕士研究生,研究方向为花岗岩机制砂混凝土。E-mail: 530267642@qq.com。
Corresponding Author：李飞(1981—),男,教授,博士,硕士生导师,研究方向为高性能混凝土机制砂。E-mail: lifei@bucea.edu.cn。
CLC No：TU528.062
Type Code：A
Serial No：1008-5548(2023)05-0081-11
