功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2015年
z1期
100-104
,共5页
陈昌礼%李维维%李良川%陈荣妃
陳昌禮%李維維%李良川%陳榮妃
진창례%리유유%리량천%진영비
水工混凝土%模拟砂浆%MgO极限掺量%压蒸膨胀率
水工混凝土%模擬砂漿%MgO極限摻量%壓蒸膨脹率
수공혼응토%모의사장%MgO겁한참량%압증팽창솔
hydraulic concrete%simulation mortar%MgO limit contents%autoclave-treated expansibility
为了满足水工大坝对外掺 MgO 混凝土自生体积膨胀变形的需要和促进外掺 MgO 混凝土的推广应用,提出采用砂子等量替代混凝土中的粗骨料拌制“模拟砂浆”试件进行压蒸实验。结果表明,采用该法测得的压蒸膨胀率均比采用水泥净浆、水泥砂浆、一级配混凝土作为压蒸试件的测值低,由此确定的混凝土的 MgO 极限掺量均比现行方法高;若以压蒸膨胀率随 MgO 掺量变化曲线的拐点对应的 MgO 掺量作为混凝土的 MgO 极限掺量,则当粉煤灰掺量为40%时,采用“模拟砂浆”试件确定的 MgO 极限掺量可达到12%。
為瞭滿足水工大壩對外摻 MgO 混凝土自生體積膨脹變形的需要和促進外摻 MgO 混凝土的推廣應用,提齣採用砂子等量替代混凝土中的粗骨料拌製“模擬砂漿”試件進行壓蒸實驗。結果錶明,採用該法測得的壓蒸膨脹率均比採用水泥淨漿、水泥砂漿、一級配混凝土作為壓蒸試件的測值低,由此確定的混凝土的 MgO 極限摻量均比現行方法高;若以壓蒸膨脹率隨 MgO 摻量變化麯線的枴點對應的 MgO 摻量作為混凝土的 MgO 極限摻量,則噹粉煤灰摻量為40%時,採用“模擬砂漿”試件確定的 MgO 極限摻量可達到12%。
위료만족수공대패대외참 MgO 혼응토자생체적팽창변형적수요화촉진외참 MgO 혼응토적추엄응용,제출채용사자등량체대혼응토중적조골료반제“모의사장”시건진행압증실험。결과표명,채용해법측득적압증팽창솔균비채용수니정장、수니사장、일급배혼응토작위압증시건적측치저,유차학정적혼응토적 MgO 겁한참량균비현행방법고;약이압증팽창솔수 MgO 참량변화곡선적괴점대응적 MgO 참량작위혼응토적 MgO 겁한참량,칙당분매회참량위40%시,채용“모의사장”시건학정적 MgO 겁한참량가체도12%。
In order to meet the requirement for the autogenic volume-expanding deformation of hydraulic concrete mixed with light-burned magnesium oxide (MgO)and promote the application of MgO concrete,the autoclave test was carried out with “simulation mortar”specimen which using equivalent amount sand to replace coarse aggregate in the concrete.The result shows that the autoclave-treated expansibility of the specimen made by this simulation method was smaller than that of cement paste,cement mortar and grade-one concrete and the MgO limit contents acquired by this method is higher than current methods.If the MgO limit contents are determined at the MgO contents correspond to the inflection point of the curve that the autoclave-treated expansibility var-ying with MgO contents,then the MgO limit contents can reach 12% with simulation mortar specimen when the fly ash content was 40% in the concrete.