预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (7): 2479-2489.

所属专题：水泥混凝土

预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究

王映祥^1,2, 彭波^1,3, 王健涛^1,2, 刘云鹏¹

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.武汉理工大学材料科学与工程学院,武汉 430070;
3.武汉新芯集成电路股份有限公司,武汉 430205

收稿日期:2024-04-18 修订日期:2024-05-07 出版日期:2024-07-15 发布日期:2024-07-24
通信作者: 刘云鹏,博士,研究员。E-mail:liuyunpeng@whut.edu.cn
作者简介:王映祥(2003—),男。主要从事轻骨料混凝土的研究。E-mail:3368176686@qq.com
基金资助:
国家自然科学基金(51972250);大学生创新创业训练计划(S202310497037)

Matching Mechanism Between Grouting Material and Lightweight Aggregate in Preplaced Lightweight Aggregate Concrete

WANG Yingxiang^1,2, PENG Bo^1,3, WANG Jiantao^1,2, LIU Yunpeng¹

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;
3. Wuhan Xinxin Semiconductor Manufacturing Co., Ltd., Wuhan 430205, China

Received:2024-04-18 Revised:2024-05-07 Online:2024-07-15 Published:2024-07-24

摘要/Abstract

摘要： 本文制备了不同强度等级(60、75、90、100、110、120 MPa)的轻质高强灌浆料,通过与不同类型、强度的轻骨料(高强球形粉煤灰陶粒、低强球形粉煤灰陶粒、碎石形页岩陶粒)复合,研究了预置轻骨料混凝土中灌浆料与轻骨料之间的匹配机制。结果表明,预置轻骨料混凝土强度与灌浆料强度存在分段线性关系,拟合曲线斜率可近似反映对灌浆料强度的利用效率。随着灌浆料强度等级提高,所配制混凝土对灌浆料强度的利用率下降。骨料的筒压强度与粒形也会影响灌浆料强度的利用率。由于嵌锁效应,碎石形页岩陶粒制备的轻骨料混凝土强度显著高于相近筒压强度球形粉煤灰骨料制备的混凝土。采用高强球形粉煤灰陶粒与碎石形页岩陶粒可分别制备出抗压强度为81.2 MPa、干表观密度为1 735 kg/m³与抗压强度为68.2 MPa、干表观密度为1 520 kg/m³的预置轻骨料混凝土。

关键词: 混凝土, 轻骨料, 轻质高强, 预置轻骨料, 骨料粒形

Abstract: In this paper, lightweight and high strength grouting materials with different strength grades(60,75,90,100,110,120 MPa) were prepared. By compounding with different types and strengths of lightweight aggregate (high strength spherical fly ash ceramsite, low strength spherical fly ash ceramsite, gravel-shaped shale ceramsite), the matching mechanism between grouting material and lightweight aggregate in preplaced lightweight aggregate concrete was studied. The results show that there is a piecewise linear relationship between the strength of preplaced lightweight aggregate concrete and grouting material strength, and the slope of fitting curve can approximately reflect the utilization efficiency of the strength of grouting material. With the increase of the strength grade of grouting material, the utilization rate of concrete to the strength of grouting material decreases. The compressive strength and grain shape of aggregate also affect the utilization rate of the strength of grouting material. Due to the interlocking effect, the strength of lightweight aggregate concrete prepared by gravel-shaped shale ceramsite is significantly higher than that of concrete prepared by spherical fly ash aggregate with similar compressive strength. Two types of preplaced lightweight aggregate concrete with compressive strength of 81.2 MPa, dry apparent density of 1 735 kg/m³ and compressive strength of 68.2 MPa, dry apparent density of 1 520 kg/m³ were prepared by using high strength spherical fly ash ceramsite and gravel-shaped ceramsite, respectively.

Key words: concrete, lightweight aggregate, lightweight and high strength, preplaced lightweight aggregate, aggregate grain size

中图分类号:

TU528

王映祥, 彭波, 王健涛, 刘云鹏. 预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究[J]. 硅酸盐通报, 2024, 43(7): 2479-2489.

WANG Yingxiang, PENG Bo, WANG Jiantao, LIU Yunpeng. Matching Mechanism Between Grouting Material and Lightweight Aggregate in Preplaced Lightweight Aggregate Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(7): 2479-2489.

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预置轻骨料混凝土中灌浆料与轻骨料的匹配机制研究

Matching Mechanism Between Grouting Material and Lightweight Aggregate in Preplaced Lightweight Aggregate Concrete

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