必贏3003no1線路檢測中心必贏3003no1線路檢測中心王俊教授團隊在國際權(quán)威學(xué)術(shù)期刊《Journal of Building Engineering》（中科院二區(qū)，影響因子7.144））上發(fā)表題為“Development of a novel rapid repairing agent for concrete based on GFRP waste powder/GGBS geopolymer mortars”的研究論文。課題組提出以回收玻纖復(fù)材(GFRP)粉末和礦渣為堿活性材料，開發(fā)了一種新型地聚物砂漿。研究表明當GFRP粉末含量為20%時，地聚物砂漿的初凝和終凝時間分別為23min和30min，6小時和1天的抗壓強度分別達到15.2MPa和35.7MPa，滿足JC/T 2381-2016規(guī)范要求。加入GFRP粉末可顯著提升礦渣地聚物砂漿的韌性。斜剪試驗結(jié)果表明，當修復(fù)時間從3天增加到7天和28天時，地聚物砂漿修復(fù)混凝土棱柱的破壞形式從界面破壞轉(zhuǎn)變?yōu)榕哑茐暮突炷粱w爆裂。微觀分析表明地聚物砂漿與混凝土形成了一個致密的界面過渡區(qū)，從而導(dǎo)致粘結(jié)強度的提高。該地聚物砂漿可替代水泥砂漿用于舊混凝土結(jié)構(gòu)的快速修復(fù)或腐蝕環(huán)境中混凝土的防護層。2020級碩士研究生鄭楚繼為該論文的第一作者，王俊教授為通訊作者。該項研究得到了國家自然科學(xué)基金（編號：52278261）、江蘇省水利科技項目（202201）、江蘇省科技資助建設(shè)項目（2021ZD05）和江蘇省研究生實踐創(chuàng)新計劃（SJCX22 0461）的資助。
Development of a novel rapid repairing agent for concrete based on GFRP waste powder/GGBS geopolymer mortars
Chuji Zheng, Zhongyang Mao, Lei Chen, Hui Qian, Jun Wang
Abstract: The use of waste glass fiber-reinforced polymer (GFRP)powder as a binding agent in the synthesis of geopolymers offers an eco-friendly solution for managing GFRP waste.The aluminosilicate present in GFRP powder can be activated by an alkaline solution to produce a sustainable geopolymer.In this study,a novel rapid repairing material was developed from partially-replaced ground granulated blast furnace slag (GGBS)by GFRP waste powder as precursors in geopolymer mortar(GM).The effect of GFRP powder replacement and mix proportions on the fresh and hardened properties of GMs were evaluated.It was found that an increase in GFRP powder replacement led to an increase in the setting time and a decrease in workability.The highest 28-day compressive strength was obtained at a 20% replacement of GGBS with GFRP powder.At this optimal mixture,the GMs achieved a compressive strength of 15.2 MPa after 6 hours and 35.7 MPa after 1 day.Results from the slant shear test revealed that the failure pattern of the GM-repaired concrete samples changed from interface failure to monolithic failure and explosive spalling in the concrete substrate (CS),when the test duration increased from 3-days to 7-days and 28-days,respectively.This was attributed to the formation of a compact interfacial zone with prolonged testing duration,leading to increased bond strength.The developed GMs demonstrate a short setting time,excellent flowability,high early mechanical strength and superior bond properties,and thus can be applied as rapid concrete repair materials or as protective coatings for concrete in corrosive environments.
文章在線網(wǎng)址：https://doi.org/10.1016/j.jobe.2023.106542
該論文50天內(nèi)免費下載網(wǎng)址https://www.sciencedirect.com/science/article/pii/S2352710223007210.
作者：鄭楚繼；審核：張濤、楊會峰
