Evaluating the strength development of mortar using clinker fine aggregate and its inhibitory effects on alkali silica reaction and delayed ettringite formation
Evaluating the strength development of mortar using clinker fine aggregate and its inhibitory effects on alkali silica reaction and delayed ettringite formation
复制标题
评价熟料细骨料砂浆的强度发展及其对碱硅反应和延迟钙矾石形成的抑制作用
DOI：
10.1007/s10163-022-01562-y
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发表时间：
2023
影响因子：
3.1
通讯作者：
Makoto Hisada
中科院分区：
文献类型：
--
作者：
Shintaro Miyamoto;Daiki Naruse;Kensuke Hayashi;Hiroshi Minagawa;Makoto Hisada
水泥熟料是一种中间水泥产品，其组成的骨料提高了混凝土的强度发展和抗传质性能。粉煤灰是一种可被水泥替代的补充胶凝材料。研究了掺加水泥熟料细骨料（CL）的高fa取代砂浆的强度发展，并测试了其对碱-硅反应（ASR）的抑制效果。除此之外，本研究还提供了评估使用水泥熟料细骨料对延迟钙矾石形成（DEF）的影响的测试结果，这可能是预制混凝土产品的问题。研究结果表明，在91日龄时，在粉煤灰与水泥替代率为80%的情况下，使用CL的砂浆的强度发展与使用石灰石细骨料而不替代FA的砂浆的强度发展相似。此外，70%和80% FA替代的灰浆即使在182日龄时也没有表现出明显的asr诱导的扩张。最后，使用熟料细骨料的砂浆在182日龄时可以抑制def引起的膨胀，其效果与使用FA的效果相似。这些研究结果可以促进混凝土中氯离子资源的利用和熟料作为细骨料在预制混凝土制品中的应用。
The aggregate composed of cement clinker, an intermediate cement product, improves strength development and mass transfer resistance of concrete. Fly ash (FA) is a supplementary cementitious material that can be substituted by cement. This study investigated the strength development of highly FA-substituted mortar mixed with cement clinker fine aggregate (CL) and tested its inhibitory effect against the alkali–silica reaction (ASR). In addition to these, this study provides the testing results of evaluating the effects of using cement clinker fine aggregate on delayed ettringite formation (DEF), which can be problematic for precast concrete products. The study results revealed that at 91 days of age, in the case of 80% replacement ratio of fly ash to cement, using CL exhibited similar strength development as mortar with limestone fine aggregate and no FA substitution. Furthermore, mortars with 70% and 80% FA substitution did not exhibit clear ASR-induced expansion even at 182 days of age. Lastly, mortar using clinker fine aggregate could suppress DEF-induced expansion at 182 days of age, which was similar to the effect obtained using FA. These results can promote the utilization of CL resources for concrete and using clinker as fine aggregate in precast concrete products.