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(1 山東建筑大學(xué)土木工程學(xué)院， 濟(jì)南 250101；2 山東建筑大學(xué)工程鑒定加固研究院， 濟(jì)南 250101)

［摘要］通過(guò)對(duì)9種不同配比的灌漿料的物理力學(xué)性能試驗(yàn)，研究了套筒灌漿料的齡期強(qiáng)度、尺寸效應(yīng)及體積穩(wěn)定性。結(jié)果表明：灌漿料的抗壓強(qiáng)度和抗折強(qiáng)度隨齡期的增加近似呈指數(shù)增長(zhǎng)，前3d強(qiáng)度增長(zhǎng)迅速，后期強(qiáng)度增長(zhǎng)緩慢； 灌漿料按設(shè)計(jì)要求配置、攪拌后較接近于勻質(zhì)材料，尺寸效應(yīng)不明顯； 增加膨脹劑的摻量可提高灌漿料養(yǎng)護(hù)階段的膨脹變形，有利于減少和延緩荷載作用下灌漿料的劈裂，但同時(shí)會(huì)造成灌漿料強(qiáng)度，尤其是早期強(qiáng)度的明顯降低。

［關(guān)鍵詞］套筒灌漿料； 齡期強(qiáng)度； 尺寸效應(yīng)； 體積穩(wěn)定性

中圖分類(lèi)號(hào)：TU528-31文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)22-0057-05

Experimental study on physical and mechanical properties of filler grout for grouting coupler

ZHENG Yongfeng1,2, ZHANG Xin1, LIU Guohui2, WANG Mengyao1

(1 School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China;2 Engineering Research Institute of Appraisal and Strengthening, Shandong Jianzhu University, Jinan 250101, China)

Abstract:Based on physical and mechanical properties tests on nine types of filler grout with different mix proportion, the age strength, size effect and volume stability of the filler grout for grouting coupler were studied. The results show that the compressive strength and flexural strength of the filler grout increase exponentially with the curing age. In the first three days, the strengths increase dramatically, but grow slowly in the late curing age. As the filler grout is prepared strictly according to its design requirements, it is can be seemed as a homogenous material, and the size effect is not obvious. Increasing the amount of expansion agent can increase the expansion deformation of the grouting stage, which is beneficial to reduce and delay the splitting of the grout under load, but meanwhile it will cause a distinct reduction of the strength, especially the early strength.

Keywords:filler grout for grouting coupler; age strength; size effect; volume stability

*山東省高等學(xué)校科技計(jì)劃項(xiàng)目(J17KA207)，國(guó)家重點(diǎn)研發(fā)計(jì)劃（2016YFC0701703）。

作者簡(jiǎn)介：鄭永峰，博士，碩士生導(dǎo)師，Email: zhyf-fb@163.com。