超高性能玻璃砂混凝土-高强钢筋粘结滑移特性及其声发射参数表征

doi:10.13229/j.cnki.jdxbgxb.20230085

Abstract

Abstract:

In order to investigate the bonding performance between ultra-high performance glass sand concrete （UHPGC） and HRB600 high-strength reinforcement， the influences of water-cement ratio （0.17， 0.19， 0.21）， steel fiber volume fraction （1%， 2%， 3%） and glass sand replacement ratio （0%， 50%， 100%） on the working and mechanical properties of UHPGC were analyzed. The variations of bonding performance between UHPGC-HRB600 were clarified based on pull-out test and acoustic emission monitoring. The results reveal that the addition of glass sand can improve the compressive strength of UHPGC， and corresponding optimum replacement ratio is 50%. The bond strength is positively correlated with the water-cement ratio and the amount of steel fiber， while it presents first increase and then decrease with the increase of the replacement ratio of glass sand. The bond-slip failure between UHPGC and HRB600 can be mainly divided into two types： splitting failure and shear pullout failure. The acoustic emission parameters exhibit favorable bond-slip characterization ability.

Key words: bridge and tunnel engineering, ultra-high performance glass sand concrete, high-strength reinforcement, bond-slip performance, acoustic emission monitoring

CLC Number:

U444

Ya-na MAO,Shi-zhong LIU,Jian XING,Hua YANG,Yu-bo JIAO. Bond⁃slip characterization between ultra⁃high performance glass sand concrete and high⁃strength reinforcement based on acoustic emission parameters[J].Journal of Jilin University(Engineering and Technology Edition), 2023, 53(6): 1686-1694.

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化学组成	石英砂	玻璃砂	硅灰	石英粉	水泥
SiO₂	99.43	71.10	98.86	99.20	22.80
Fe₂O₃	0.0255	0.51	0.14	0.01	4.43
Al₂O₃	0.18	2.15	0.12	0.10	4.01
CaO	0.11	11.10	0.57	0.21	65.32
MgO	0.01	1.30	0.20	0.17	2.07
Na₂O	-	14.07	0.35	0.11	0.07
K₂O	0.03	0.28	0.21	0.81	0.56

物理特性	石英砂	玻璃砂
堆积密度/（kg·m^-3）	1536.31	1579.62
平均粒径/μm	300	300
最大粒径/μm	600	600
压碎值/%	3.29	5.28

组号	材料组成
组号	水泥	硅灰	石英砂	玻璃砂	石英粉	钢纤维	水	减水剂
1	850	195.5	467.5	467.5	331.5	148.75	161.5	42.5
2	850	195.5	935	0	331.5	223.55	161.5	42.5
3	850	195.5	467.5	467.5	331.5	148.75	161.5	42.5
4	850	195.5	0	0	331.5	148.75	178.5	42.5
5	850	195.5	935	0	331.5	148.75	178.5	42.5
6	850	195.5	467.5	467.5	331.5	223.55	178.5	42.5
7	850	195.5	467.5	467.5	331.5	223.55	144.5	42.5
8	850	195.5	935	0	331.5	74.8	161.5	42.5
9	850	195.5	467.5	467.5	331.5	74.8	178.5	42.5
10	850	195.5	935	0	331.5	148.75	144.5	42.5
11	850	195.5	467.5	467.5	331.5	148.75	161.5	42.5
12	850	195.5	467.5	467.5	331.5	148.75	161.5	42.5
13	850	195.5	467.5	467.5	331.5	148.75	161.5	42.5
14	850	195.5	467.5	467.5	331.5	74.8	144.5	42.5
15	850	195.5	0	935	331.5	74.8	161.5	42.5
16	850	195.5	0	935	331.5	223.55	161.5	42.5
17	850	195.5	0	935	331.5	148.75	144.5	42.5

组别	水胶比	钢纤维掺量/%	替换率/%	滑移量/mm	破坏模式
1	0.17	2	0	8	劈拉破坏
2	0.17	3	50	12.2	劈拉破坏
3	0.17	1	50	6.4	劈拉破坏
4	0.17	2	100	7.2	劈拉破坏
5	0.19	1	100	0.55	劈裂破坏
6	0.19	3	0	13.4	劈拉破坏
7	0.19	3	100	8.8	劈拉破坏
8	0.19	1	0	0.22	劈裂破坏
9	0.21	2	0	0.39	劈裂破坏
10	0.21	2	100	0.442	劈裂破坏
11	0.21	1	50	0.15	劈裂破坏
12	0.21	3	50	3.6	劈拉破坏
13	0.19	2	50	6.3	劈拉破坏

Bond⁃slip characterization between ultra⁃high performance glass sand concrete and high⁃strength reinforcement based on acoustic emission parameters

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