CAJ | 학술논문

为研究不同矿物细掺合料对活性粉末混凝土耐久性的影响,采用 NEL 法(电导法)比较硅灰和粉煤灰双掺、硅灰和石英粉双掺、硅灰和粉煤灰及石英粉互掺、硅灰和硅微粉双掺共四组 RPC(活性粉末混凝土)不同的抗氯离子系数,然后用菲克第二定律计算出不同配合比、不同使用年限的保护层厚度。研究结果表明,在同一设计年限内,硅灰和粉煤灰双掺所需要的保护层厚度最低,同比例的硅灰和硅微粉双掺效果最差；用粉煤灰取代40%的硅灰50年、100年、150年龄期的保护层厚度分别为50 mm、70 mm、86 mm,相对于其他三组矿物掺合料能有效的降低保护层厚度。说明粉煤灰取代硅灰用于 RPC 耐久性设计的效果最好。
위연구불동광물세참합료대활성분말혼응토내구성적영향,채용 NEL 법(전도법)비교규회화분매회쌍참、규회화석영분쌍참、규회화분매회급석영분호참、규회화규미분쌍참공사조 RPC(활성분말혼응토)불동적항록리자계수,연후용비극제이정률계산출불동배합비、불동사용년한적보호층후도。연구결과표명,재동일설계년한내,규회화분매회쌍참소수요적보호층후도최저,동비례적규회화규미분쌍참효과최차；용분매회취대40%적규회50년、100년、150년령기적보호층후도분별위50 mm、70 mm、86 mm,상대우기타삼조광물참합료능유효적강저보호층후도。설명분매회취대규회용우 RPC 내구성설계적효과최호。
In order to study the effects of different mineral fine admixture on the durability of reac-tive powder concrete (RPC), NEL (Nernst-Einstein) method was used to compare the chloride-re-sistance coefficient of the four groups of RPC doubly-mixed with fly ash and silica fume, quartz pow-der and silica fume, silicon powder and silica fume, and triply-mixed with fly ash, quartz powder and silica fume, respectively. Then, the Second Fick’s Law was used to calculate the cover thick-ness under different mixture proportion and service life. It is concluded by experiment and calcula-tion that the group RPC of fly ash and silica fume is the best for the same design life, and it needs the lowest cover thickness for the same rate. The poorest group is the RPC doubly-mixed with the silicon powder and silica fume. The cover thickness are respectively 50 mm, 70 mm, 86 mm when the design lives are 50 years, 100 years, 150 years ,and 40% of silica fume is replaced by fly ash-the cover thickness is effectively decreased compared with the other 3 groups. Fly ash is the best choice to replace quartz powder for the design life of RPC.