添加爐石粉與飛灰混凝土配比設計與水泥強度效益分析

本文以修正DMDA及矩陣法設計爐石粉與飛灰混凝土配比（13組），經拌合後測試工作性及抗壓強度，計算水泥強度效益值（CSE），評估在台灣綠建築EEWH系統減廢指標的適合性。結果顯示，矩陣分析法配合電腦快速計算，比傳統代數法簡潔、便利、效率。配比內束制拌和水量（150kg/m^3）摻入高性能減水劑，有助於工作性及抗壓強度。w/cm=0.40與28天齡期，其中四組配比C40（Type I水泥）、M40（中細度爐石粉水泥）、H40（高細度爐石粉水泥）、A40II（傳統混凝土Type II水泥），抗壓強度都大於41MPa。56天CSE值分別為55.8，113.7，115.7，14.3psi/kg，而水泥用量只用A40II配比的25.9，13.0，13.0%。高卜作嵐比例（p/b）及CSE值，可符合EEWH綠建築系統的CO_2減量與廢棄物減量指標。加拿大溫哥華曾舉辦2010冬季奧運，所有場館設施，採用低水量與飛灰和爐石粉配比通過LEED銀級以上認證可供參考。

關鍵字

修正DMDA ；矩陣法； CSE ；爐石粉；飛灰

並列摘要

This paper mainly uses modified DMDA and the numerical matrix method to construct a concrete mixture with slag and fly ash. The workability and compressive strength were tested and the cement strength efficiency (CSE) were calculated to assess the aptness of waste reduction of the EEWH system for green building in Taiwan from the use of a trial batch. The results showed that the matrix analysis method with a computer quick calculation and a traditional algebraic method was simple, convenient, and efficient. Restricting the mixing water and adding a superplasticizer enhances the workability and compressive strength of concrete. With w/cm = 0.40, aged for 28 days, and the use of the following four different mixtures: C40 (Type I cement), M40 (medium fineness slag cement), H40 (high fineness slag cement), and A40II (traditional concrete Type II cement) results in a compressive strength greater than 41MPa. After aging 56 days, the CSE values were 55.8, 113.7, 115.7, and 14.3 psi/kg, while the amount of cement used was only A40II 25.9, 13.0, and 13.0%. A high pozzolans ratio (p/b) and CSE values met the EEWH system indexes for CO_2 reduction and waste reduction. A potential reference case can be seen from the venues for the 2010 Winter Olympics held in Vancouver, Canada which used fly ash and slag concrete to achieve LEED Silver certification.