花崗巖石粉復(fù)合礦粉、粉煤灰對混凝土性能的影響

打開文本圖片集

Effect of Granite-stone Powder Compound Mineral Powder and Fly Ash on Concrete Properties1，，2，2，?，'，

1．，北京；2.，南寧)

中圖分類號：TU528 文獻標(biāo)志碼：A 文章編號：1005-8249（2025）01-0024-05

DOI：10.19860/j.cnki.issn1005- 8249.2025.01.005

I Chongzhi’，WANG Wanyi'，LIANG Zhiyong2，TAN Ting2，PENG Jiaman’，WANG Kun’，RENQiangwei (1. School of Civil and Transportation Engineering， Beijing University of Civil Engineering and Architecture， Beijing 1OO044， China； 2. Guangxi Baotian Environmental Protection Materials Co.，Ltd.，Nanning ，China）

Abstract：Toenhancetheemphasisontheeficientutilizationof granite powderandsustainableenvironmentaldevelopment， thestudyexplorestheimpactofgranitepowderonthepropertiesofcompositecementslurryconsistingofmineralpowderandfly ash，as wellastheperformanceoftheresulting C3Oand C5Oconcrete.Theresultsshowthat when the granite powderis mixed into 1：1 mineral powderandflyash，the fluidityof cement slurry reaches the maximum when the granite powder is mixed with （204號 10% ，and the fluidity of slurry decreases rapidly when the granite powder is mixed with more than 30% ．The influence on compressive strength of 28 day cement mortar is the largest when 30% is added，and the influence on flexural strength is relatively small. When the composite admixture of 15% granite powder is applied to C3O and C5O concrete，the newly mixed concrete hasgoodworkabity，nosegregationand bleeding problem，theappearanceofconcreteissmooth，andthe 28day compressive strength increasedto 36.7MPaand56.8MPa.Thecarbonation depth testshows thatanapropriateamountof granite powder can effectively improve the carbonation resistance of concrete.

Key words： granite powder； compound admixture；concrete

0 引言

花崗巖作為一種常見的建筑材料，花崗巖石材經(jīng)打磨、拋光等工藝處理時產(chǎn)生大量廢棄石粉，這些花崗巖石粉若未能得到及時有效的處理與利用，可能堆積成山，占用土地資源，污染環(huán)境[1]。（剩余10573字）