【摘要】：以工程應(yīng)用為背景,結(jié)合現(xiàn)場(chǎng)實(shí)際情況,在混凝土中復(fù)合摻加粉煤灰及礦粉,以期提高混凝土的工作性、強(qiáng)度、耐久性等若干性能,配制高性能混凝土。高性能混凝土由于具有良好的耐久性、工作性、強(qiáng)度和良好的體積穩(wěn)定性等許多優(yōu)良特性,被認(rèn)為是目前全世界性能最為全面的混凝土,已廣泛應(yīng)用于在橋梁、高層建筑、海港建筑等工程中。本研究以正交設(shè)計(jì)方法安排試驗(yàn),以摻合料混合比例及取代水泥量為研究因素,考核混凝土工作性及3d、28d、56d強(qiáng)度、混凝土耐久性等主要指標(biāo)。以工程中應(yīng)用的C30、C40、C50為研究對(duì)象,研究摻合料等量取代水泥后,混凝土工作性、強(qiáng)度及耐久性變化規(guī)律。選用為P.O 42.5水泥進(jìn)行試驗(yàn),測(cè)試分析混凝土的工作性和混凝土三個(gè)齡期的抗壓強(qiáng)度。通過(guò)分析摻合料摻量及摻配比例對(duì)混凝土各齡期抗壓強(qiáng)度與及工作性影響,總結(jié)出相應(yīng)影響規(guī)律,在此基上確定了不同強(qiáng)度等級(jí)混凝土中摻合料的最佳摻配比例及摻量;對(duì)混凝土孔結(jié)構(gòu)、電通量及抗凍性進(jìn)行了研究。結(jié)果表明:粉煤灰與礦粉雙摻比例為1:1.5,取代水泥量為20%時(shí),混凝土各項(xiàng)性能指標(biāo)良好,滿足工程實(shí)際應(yīng)用。
[Abstract]:With the background of engineering application and the actual situation in the field, fly ash and mineral powder are mixed in concrete to improve the workability, strength and durability of concrete and to prepare high performance concrete. Because of its good durability, workability, strength and volume stability, high performance concrete is considered to be the most comprehensive concrete in the world, and has been widely used in bridges and high-rise buildings. In the works of seaport construction, etc. In this study, the orthogonal design method is used to arrange the test, and the mixing ratio of admixtures and the quantity of cement substitute are taken as the research factors, and the workability of concrete, the strength of concrete at 28 days and 56 days, and the durability of concrete are examined. Taking C30C40C50 used in engineering as the research object, the variation law of workability, strength and durability of concrete after the equal replacement of cement with admixture is studied. The workability of concrete and the compressive strength of three ages of concrete were tested and analyzed by using P.O 42.5 cement. By analyzing the influence of admixture content and admixture ratio on the compressive strength and workability of concrete at different ages, the corresponding influence law is summarized, and the optimum admixture proportion and amount of admixture in concrete of different strength grades are determined on this basis. The pore structure, electric flux and frost resistance of concrete were studied. The results show that when the ratio of fly ash and mineral powder is 1: 1.5, and the cement is replaced by 20%, the performance of concrete is good and meets the practical application in engineering.
【學(xué)位授予單位】：石家莊鐵道大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU528

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃遷亮;;高性能混凝土技術(shù)的可持續(xù)發(fā)展[J];建設(shè)科技;2011年07期

2 初少鳳;施養(yǎng)杭;;高性能混凝土的研究現(xiàn)狀與應(yīng)用前景[J];低溫建筑技術(shù);2007年06期

3 劉斌;;集料物性對(duì)高性能混凝土強(qiáng)度的影響[J];科技信息(科學(xué)教研);2007年29期

4 李曉芝;韓龍君;劉明泉;;淺析高性能混凝土強(qiáng)度狀態(tài)早齡期預(yù)測(cè)方法[J];山西建筑;2007年24期

5 王亮;;影響混凝土強(qiáng)度的各種因素[J];科技信息;2007年10期

6 唐咸燕;肖佳;陳烽;陳雷;;水泥-粉煤灰-礦渣復(fù)合膠凝材料的水化性能研究[J];粉煤灰綜合利用;2006年06期

7 袁明金;;礦渣粉、粉煤灰在混凝土中的應(yīng)用[J];廣東建材;2006年08期

8 周冬林;曹曉潤(rùn);;高性能混凝土減縮劑概述[J];河南建材;2006年03期

9 高永勇;;礦渣微粉在普通混凝土中的應(yīng)用[J];福建建材;2006年02期

10 蘇志學(xué);胡小芳;;新拌高性能混凝土流動(dòng)性測(cè)試方法探討[J];廣東建材;2006年02期

，

本文編號(hào)：2175266