- 摘 要
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寇海磊1,2,俞峰3,張明義4,郭燕文4
（1 濰坊學(xué)院建筑工程學(xué)院， 濰坊 261061； 2 新加坡南洋理工大學(xué)土木與環(huán)境工程學(xué)院，新加坡 639798；
3 浙江理工大學(xué)建筑工程學(xué)院， 杭州 310018；
4 青島理工大學(xué)土木工程學(xué)院， 青島 266033）
［摘要］堿渣與粉煤灰固體拌合制成工程土可用作道路基礎(chǔ)或大面積填墊材料，通過原位試驗將堿渣與粉煤灰液相混合后進(jìn)行吹填。研究表明，堿渣與粉煤灰固體含量最優(yōu)配比為7∶3，此時堿渣土最優(yōu)含水量與最大干密度分別為63.5%和0.88g/cm3，滲透性較低，養(yǎng)護(hù)7d后無側(cè)限抗壓強(qiáng)度約為純堿渣的6.5倍。現(xiàn)場液相吹填的堿渣土混合較好，沉淀層厚度約為80cm。經(jīng)5個月自然晾曬后，堿渣土含水量介于160%～180%，深度方向輕型動力觸探擊數(shù)介于1～5，具有一定強(qiáng)度。相比固體拌合堿渣土，液相吹填堿渣土工藝簡單，能夠大批量、低成本利用堿渣，后期強(qiáng)度可通過真空預(yù)壓等排水固結(jié)措施滿足工程需要。
［關(guān)鍵詞］堿渣； 粉煤灰； 液相混合； 試驗； 野外吹填
中圖分類號：TU 442文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)02-0096-04
Experimental study on the liquid-pumping filling mixture with soda waste and fly ash
Kou Hailei1, 2, Yu Feng3, Zhang Mingyi4, Guo Yanwen4
(1 School of Civil Engineering and Architecture, Weifang University, Weifang 261061, China；
2 School of Civil and Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore；
3 School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China；
4 School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China)
Abstract:The mixture of soda waste and fly ash is likely to serve as engineering soil for road foundation and large area filling material. By in-situ test, the soda waste and fly ash were mixed in form of liquid mixture and conducted pumping filling. The study indicates that the optimum mixing ratio of solid volume of soda waste versus fly ash is 7∶3, corresponding to the optimum water content and the maximum dry density to be respectively 63.5 % and 0.88g/cm3 for soda waste. The prepared mixture has low permeability and its unconfined compressive strength is about 6.5 times the original strength after 7-day curing period. The pumping filling soda waste was mixed well in field with the deposited layer of about 80 cm. After 5-month sun-cure, the water content of the mixture ranges between 160 % ～ 180 % and the blow number of light dynamic penetration test ranges between 1～5, showing fairly good strength. Compared with the solid-mixing method for soda waste, the liquid-pumping filling method for soda waste is simple in operation and is able to dispose a large amount of soda waste with low cost. The strength of the mixture may be further increased to reach engineering need through some drainage consolidation methods such as vacuum preloading.
Keywords:soda waste； fly ash； liquid mixture； test； pumping filling in field
*國家自然科學(xué)基金項目（51408439）,山東省住房和城鄉(xiāng)建設(shè)廳科學(xué)技術(shù)項目（KY048）,浙江理工大學(xué)521人才培養(yǎng)計劃。
作者簡介：寇海磊，博士后，講師，Email: kou123321@126.com。
