CAJ | 학술논문

研究目的：以天然火山灰混凝土为研究对象，通过加速碳化试验与差热分析试验对未掺加矿物掺合料的基准混凝土、火山灰混凝土及粉煤灰混凝土的抗碳化性能进行对比分析，并研究掺加少量硅灰对火山灰混凝土抗碳化性能的改善效果，为实际工程提供技术指导。研究结论：（1）与基准混凝土相比，由于水泥孰料减少和二次水化消耗的双重作用，火山灰混凝土和粉煤灰混凝土中的 Ca（OH）2的含量少，抗碳化性能显著降低；（2）同掺量的粉煤灰混凝土与火山灰混凝土相比，粉煤灰混凝土抗碳化性能优于火山灰混凝土；（3）掺加硅灰的火山灰混凝土的抗碳化性能明显提高，掺加5％硅灰的火山灰混凝土甚至优于粉煤灰混凝土，可以代替粉煤灰混凝土使用；（4）差热分析试验从机理上验证和分析了宏观试验结果；（5）对于天然火山灰资源丰富地区的混凝土工程，该研究成果可以促进地方资源的有效利用，为实际工程带来环境和经济效益。
연구목적：이천연화산회혼응토위연구대상，통과가속탄화시험여차열분석시험대미참가광물참합료적기준혼응토、화산회혼응토급분매회혼응토적항탄화성능진행대비분석，병연구참가소량규회대화산회혼응토항탄화성능적개선효과，위실제공정제공기술지도。연구결론：（1）여기준혼응토상비，유우수니숙료감소화이차수화소모적쌍중작용，화산회혼응토화분매회혼응토중적 Ca（OH）2적함량소，항탄화성능현저강저；（2）동참량적분매회혼응토여화산회혼응토상비，분매회혼응토항탄화성능우우화산회혼응토；（3）참가규회적화산회혼응토적항탄화성능명현제고，참가5％규회적화산회혼응토심지우우분매회혼응토，가이대체분매회혼응토사용；（4）차열분석시험종궤리상험증화분석료굉관시험결과；（5）대우천연화산회자원봉부지구적혼응토공정，해연구성과가이촉진지방자원적유효이용，위실제공정대래배경화경제효익。
Research purposes:Taking natural pozzolanic concrete as the study object,this paper carries out a comparative analysis on the carbonation resistance of basic concrete (no mineral admixture),pozzolanic concrete and fly ash concrete through accelerated carbonation test and differential thermal analysis.It also studies the improvement effect of adding few silica fumes on the carbonation resistance of pozzolanic concrete.The experimental study can provide technical guidance for actual engineering. Research conclusions:(1 ) Under the dual effect of reduction of cement clinker and consumption of secondary hydration,the contents of Ca (OH)2 in pozzolanic concrete and fly ash concrete both decrease,so the carbonation resistance remarkably declines compared with that of basic concrete.(2 )Under the same amount of admixture, comparing the fly ash concrete with the pozzolanic concrete,the carbonation resistance of the former is better than the latter.(3 )The carbonation resistance of pozzolanic concrete mixed with silica fume increases significantly.The pozzolanic concrete mixed with 5% of silica fume,is even better than the fly ash concrete.Therefore,in terms of carbonation resistance,the fly ash concrete can be replaced by pozzolanic concrete mixed with 5% of silica fume. (4)The macroscopic experimental results are validated and analyzed by differential thermal analysis experiment. (5)For concrete engineering with rich natural volcanic ash resources,the research resutlts can stimulate the effective utilization of local resources,and bring the environmental benefits and economic benefits for actual engineering.