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（1 湖南大學(xué)土木工程學(xué)院，長(zhǎng)沙 410082;2 湖南固特邦土木技術(shù)發(fā)展有限公司，長(zhǎng)沙 410205）

[摘要]  研究了不同水性環(huán)氧樹(shù)脂對(duì)改性水泥砂漿強(qiáng)度的影響，考察了水性環(huán)氧種類、聚合物摻量變化和稀釋劑對(duì)改性水泥砂漿性能的影響，使用SEM、激光粒徑分析和表面張力測(cè)定等手段對(duì)水性環(huán)氧改性機(jī)理進(jìn)行了分析。研究結(jié)果表明，聚膠比為15%時(shí)水性環(huán)氧改性砂漿強(qiáng)度可滿足潮濕界面結(jié)構(gòu)加固用聚合物砂漿的要求；復(fù)合活性稀釋劑可有效改善砂漿的工作性和可使用時(shí)間，明顯提高砂漿的韌性，當(dāng)稀釋劑相對(duì)環(huán)氧樹(shù)脂外摻14%時(shí)，抗折強(qiáng)度比未摻稀釋劑時(shí)提高63%，達(dá)到20.4MPa。

[關(guān)鍵詞]  水性環(huán)氧；改性砂漿；潮濕界面粘結(jié)；結(jié)構(gòu)加固

中圖分類號(hào)：TU57+8.12     文獻(xiàn)標(biāo)識(shí)碼：A         文章編號(hào)：      

*長(zhǎng)沙市重大科技專項(xiàng)資助項(xiàng)目（K1204010-31）。

作者簡(jiǎn)介：彭勃，博士，教授，Email: pungbo@sina.com。

Study on epoxy modified cement mortar for use in wet interface structural strengthening

Peng Bo¹, Mei Shipeng¹, Shan Yuanming², Tian Tian²

(1 Civil Engineering College of Hunan University, Changsha 410082, China;

2 Hunan Goodbond Construction Technic Development Co., Ltd., Changsha 410205, China)

Abstract: The influences of different waterborne epoxy products on the strength of polymer modified cement mortar were studied. This study focused on the performance of epoxy modified mortar with different waterborne epoxy types, different epoxy dosages and different diluents dosages. SEM, laser particle size analyzer and surface tension meter were used to analyze the function and mechanism of waterborne epoxy in cement mortar. The results show that strength properties can meet the requirements of wet interface structural strengthening polymer modified mortar when polymer-binder ratio is increased to 15%. Reactive diluents will improve the workability and increase the amount of time before initial setting, as well as improve the toughness of modified mortar. The flexural strength of modified mortar with diluents outer dosage of 14% can reach 20.4MPa, an increase of 63% compared to modify mortar without diluents.

Keywords: waterborne epoxy; modified mortar; wet interface bonding; structural strengthening

參  考  文  獻(xiàn)

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