低钙粉煤灰地质聚合物混凝土抗拉强度及钢筋与混凝土粘结强度的实用预测模型

Practical Prediction Models of Tensile Strength and Reinforcement-Concrete Bond Strength of Low-Calcium Fly Ash Geopolymer Concrete.

作者信息

Luan Chenchen, Wang Qingyuan, Yang Fuhua, Zhang Kuanyu, Utashev Nodir, Dai Jinxin, Shi Xiaoshuang

机构信息

Key Laboratory of Deep Underground Science and Engineering (Ministry of Education), Department of Architecture and Environment, Sichuan University, Chengdu 610065, China.

Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Lab of Sichuan Province, Chengdu 610065, China.

出版信息

Polymers (Basel). 2021 Mar 12;13(6):875. doi: 10.3390/polym13060875.

DOI:10.3390/polym13060875

PMID:33809247

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8001605/

Abstract

There have been a few attempts to develop prediction models of splitting tensile strength and reinforcement-concrete bond strength of FAGC (low-calcium fly ash geopolymer concrete), however, no model can be used as a design equation. Therefore, this paper aimed to provide practical prediction models. Using 115 test results for splitting tensile strength and 147 test results for bond strength from experiments and previous literature, considering the effect of size and shape on strength and structural factors on bond strength, this paper developed and verified updated prediction models and the 90% prediction intervals by regression analysis. The models can be used as design equations and applied for estimating the cracking behaviors and calculating the design anchorage length of reinforced FAGC beams. The strength models of PCC (Portland cement concrete) overestimate the splitting tensile strength and reinforcement-concrete bond strength of FAGC, so PCC's models are not recommended as the design equations.

摘要

已有一些尝试来开发FAGC（低钙粉煤灰地质聚合物混凝土）劈裂抗拉强度和钢筋与混凝土粘结强度的预测模型，然而，没有一个模型可作为设计方程使用。因此，本文旨在提供实用的预测模型。利用来自实验和以往文献的115个劈裂抗拉强度试验结果和147个粘结强度试验结果，考虑尺寸和形状对强度的影响以及结构因素对粘结强度的影响，本文通过回归分析开发并验证了更新的预测模型以及90%的预测区间。这些模型可作为设计方程使用，并应用于估算钢筋FAGC梁的开裂行为和计算其设计锚固长度。普通硅酸盐水泥混凝土（PCC）的强度模型高估了FAGC的劈裂抗拉强度和钢筋与混凝土的粘结强度，因此不建议将PCC的模型作为设计方程。