方坤河　阮　燕　曾　力

提　要　根據(jù)巖灘工程7～10年齡期的少水泥高摻粉煤灰碾壓混凝土芯樣的微觀、亞微觀及部分宏觀性能試驗結(jié)果，對該混凝土的長齡期性能進行討論。該混凝土水化產(chǎn)物正常、穩(wěn)定、結(jié)構(gòu)致密。隨著齡期的進一步延長，粉煤灰還會不斷水化，混凝土的孔隙結(jié)構(gòu)不斷改善，強度仍在增長，其它性能將得到進一步提高。水化產(chǎn)物穩(wěn)定，混凝土抗溶蝕能力強。
關(guān)鍵詞　少水泥　碾壓混凝土　長齡期　性能

Late-age Properties of RCC with Low Cement
Content and High Fly Ash Content

Fang Kunhe　Ruan Yan　Zeng Li
(Wuhan University of Hydraulic and Electric Engineering　Wuhan　430072)

Abstract　The low cement content and high fly ash content RCC cores of Yantan project had been tested in different ages(up to 7 to 10 years).According to the microscopical,sub-scopical,macroscopical test results,the late-age properties of the RCC have been discussed.Micro-analysis shows that the hydration in RCC is consistent with normal concrete and the main products are stable at the age of 7 years,even 10 years.Internal structure of RCC is compact.The hydration of fly ash will proceed with age extending.The voids structure of RCC will improve continuously.Strength of RCC will grow in parallel with age. Other characteristics will be improved further.The main hydration products in RCC are stable.Dissolution-resisting characteristic of the RCC is strong.
Key Words　Low cement content　RCC　Late-age　Properties