A Study on the Effect of Steam Curing Regime on Properties of RPPC

• Main Authors: Mi-Chen Chen, 陳弭塵
• Other Authors: 劉明仁
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/25585167486807982395

碩士 === 淡江大學 === 土木工程學系碩士班 === 96 === Reactive powder porous concrete (RPPC) which combines the characteristics of porous concrete and ultra-high strength concrete possess excellent drainage, sound absorption and skid resistance. The addition of silica fume, crushed quartz, superplasticizer and steel fiber helps to improve compressive and flexural strength of RPPC. In this study both hot-water and steam curing, each with 25℃, 50℃ and 75℃ temperature settings, were utilized. RPPC specimens subjected to different curing regimes were evaluated and compared their performance via compressive strength, flexural strength, Cantabro and British Pendulum tests. Major findings based on the results of this study are summarized as follow: 1. Compressive strength test results showed that both 75℃ steam curing and 75℃ hot-water curing were among the most effective, whereas 50℃ and 25℃ steam curing were not very impressive as expected. 2. Test results showed that RPPC specimens with 75℃ steam and 75℃ hot-water curing have 28-day compressive strengths greater than 320 kg/cm2, and 28-day flexural strengths greater than the design strength, 45 kg/cm2. 3. Original compressive strength data analysis was annoyed by the variation of specimens’ air voids. Strength data then were adjusted to a common level according to the strength-air voids relationships. The data adjustment would help to reduce the influence of noise variable (air voids) in data analysis. 4. Cantabro, permeability and British Pendulum test results showed that RPPC specimens with steam curing had generally good abrasion resistance, drainage (>0.01cm/sec) and skid resistance.