Effect of Content and Fineness of GGBS on Pore Structure of Cement Paste  

作　　者：DAI Jinpeng WANG Qicai ZHANG Xin BI Ruixiao DU Wentao 代金鹏;WANG Qicai;ZHANG Xin;BI Ruixiao;DU Wentao(National and Provincial Joint Engineering Laboratory of Road&Bridge Disaster Prevention and Control,Lanzhou Jiaotong University,Lanzhou,730070,China;Civil Engineering Department,Lanzhou Jiaotong University,Lanzhou,730070,China)

机构地区：[1]National and Provincial Joint Engineering Laboratory of Road&Bridge Disaster Prevention and Control,Lanzhou Jiaotong University,Lanzhou,730070,China [2]Civil Engineering Department,Lanzhou Jiaotong University,Lanzhou,730070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第5期933-947,共15页武汉理工大学学报（材料科学英文版）

基　　金：Funded by National Natural Science Foundation of China (Nos.51808272, 51768033);Gansu Youth Science and Technology Fund (No.21JR7RA330);Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University,Gansu Province Youth Talent Support Project (No. GXH20210611-10);Key R&D Capability Enhancement Project of Gansu Provincial Finance Department (No. 2019zx-09);the Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (No. IRT_15R29)。

摘　　要：The effect of the content and specific surface area of the ground granulated blast furnace slag (GGBS) on the pore structure of the cement paste was determined through the low-field nuclear magnetic resonance (NMR).The Pearson correlation analysis method was used to calculate the correlation coefficient between the porosity and age of cement paste,the specific surface area of GGBS and the content of GGBS.The test results exhibited that the porosity of the cement paste with different ageing durations gradually decreased on increasing the content and specific surface area of GGBS.The content and specific surface area of GGBS had a negligible effect on the 1-10 nm size gel pores in the cement paste,whereas,had a significant effect on the 10-100 nm size capillary pores.In addition,these parameters did not affect the final most probable pore size of the cement paste.The correlation between age and porosity was the largest,and the correlation between GGBS content and porosity was greater than that between GGBS specific surface area and porosity.Moreover,a modified pore structure model was successfully developed to effectively predict the pore structure of the GGBS based cement paste.

关 键 词：ground granulated blast furnace slag pore structure FINENESS cement paste low-field nuclear magnetic resonance 

分 类 号：TQ177.62[化学工程—硅酸盐工业] TU528[建筑科学—建筑技术科学]