CAJ | 학술논문

基于正交设计方法，采用硫酸铝、三乙醇胺、氟化钠、亚硝酸钙等原材料成功研制出一种低碱液体速凝剂。该速凝剂初凝时间为2 min40 s，终凝时间5 min40 s，28 d抗压强度比为93.8%，各项指标均满足JC 477—2005《喷射混凝土用速凝剂》中一等品的要求，且具有较好的适应性。最后，采用XRD测试方法，揭示了低碱速凝剂的促凝机理。
기우정교설계방법，채용류산려、삼을순알、불화납、아초산개등원재료성공연제출일충저감액체속응제。해속응제초응시간위2 min40 s，종응시간5 min40 s，28 d항압강도비위93.8%，각항지표균만족JC 477—2005《분사혼응토용속응제》중일등품적요구，차구유교호적괄응성。최후，채용XRD측시방법，게시료저감속응제적촉응궤리。
Based on orthogonal design method,a low alkali liquid flash setting admixture is successfully invented by using aluminum sulfate,triethanolamine,sodium fluoride,calcium nitrite materials.The initial setting time of the flash setting admixtures is 2 min40 s ,and the final setting time is 5 min40 s,28 day compressive strength ratio is 93.8%.Each index is satisfied with the first-class product require-ments in“Flash setting admixtures for shotcrete”(JC 477—2005),and it has better adaptability for the cement of different manufacturers. Finally,XRD test method revealed procoagulant mechanism of low-alkali accelerator .