硅质集料碱活性快速砂浆棒试验方法2.养护碱溶液和砂浆胶砂比与试样膨胀的关系

STUDIES ON AN ACCELERATED MORTAR-BAR TEST METHOD FOR POTENTIAL ALKALI REACTIVITY OF SILICEOUS AGGREGATE 2 INFLUENCE OF ALKALI CURING AND CEMENT AGGREGATE RATIOS ON EXPANSION OF MORTAR BARS

研究了养护碱溶液性质和胶砂比与硅质集料砂浆试样膨胀的关系。养护碱溶液质量分数愈高、碱离子活度愈高 ,试样膨胀愈大 ;胶砂比的影响比较复杂 ,集料潜在碱活性不同 ,试样对应的敏感胶砂比不一样。

The influences of specimen dimensions on expansion coefficient of mortar bars were investigated. The results showed that the influences were not significant. The tests with 4 cm×4 cm×16 cm speciments were more accurate than that with 2 cm×2 cm×8 cm speciments. By a comparison among the tests on granite sand and gravel sand with the new method, CECS 48∶93 and ASTM C1260 94, the test period was settled as 5 d and 14 d.