發(fā)布時間：2018-04-22 13:11

  本文選題：高性能混凝土 + 外加劑��； 參考：《安徽建筑大學(xué)》2015年碩士論文

【摘要】：從高性能混凝土概念提出以來,人們對發(fā)展高性能混凝土比較重視和關(guān)注,但由于高性能混凝土屬于新技術(shù),目前還處于不斷發(fā)展、完善過程之中,在工程應(yīng)用過程中還存在一些需要改善的地方,對此各國學(xué)者也不斷對高性能混凝土進(jìn)行全面研究,為高性能混凝土進(jìn)一步推廣應(yīng)用提供技術(shù)支撐。近年來,在工程結(jié)構(gòu)領(lǐng)域高性能混凝土的使用得到廣泛發(fā)展,且使用量巨大,但是人們也普遍認(rèn)識到如何充分發(fā)揮高性能混凝土的經(jīng)濟(jì)效益,提高其綜合性能,保證建設(shè)工程質(zhì)量,滿足工程建設(shè)需要,成為高性能混凝土急需研究的課題。本文首先從高性能混凝土的各項(xiàng)組成材料入手,研究分析了水泥、粗細(xì)骨料、外加劑、礦物摻合料對高性能混凝土綜合性能的影響,并通過試驗(yàn)研究分析高性能混凝土各種組成材料在使用和選擇上對其性能的影響程度,通過對比分析提出了高性能混凝土對各種組成材料選擇和使用的基本技術(shù)要求。由于高性能混凝土具有低水膠比、高工作性的特征,在原材料選擇上要選擇優(yōu)質(zhì)、質(zhì)量穩(wěn)定好的組成材料,同時,除水泥、骨料、水傳統(tǒng)基本組成材料外,必須摻入外加劑和礦物摻合料,外加劑和礦物摻合料的品種和摻量對高性能混凝土的性能影響非常大,摻量不宜過大,要控制合適的摻量比例,同時通過雙摻礦物摻合料能顯著改善高性能混凝土的性能。同時要實(shí)現(xiàn)混凝土的高性能化,除選擇優(yōu)質(zhì)、合適的組成材料外,各項(xiàng)組成材料的摻入比例及混凝土的配合比設(shè)計(jì)工作也至關(guān)重要,本文接著對高性能混凝土配合比設(shè)計(jì)進(jìn)行研究,綜合分析了高性能混凝土在配合比設(shè)計(jì)時需要滿足的基本原則,并選取水膠比、砂率、粉煤灰、硅灰作為影響高性能混凝土性能的四個主要因素,通過正交試驗(yàn)設(shè)計(jì)進(jìn)行混凝土配合比設(shè)計(jì),根據(jù)正交試驗(yàn)結(jié)果的極差分析研究各項(xiàng)影響因素的主次順序,提出了最佳配合比設(shè)計(jì)。養(yǎng)護(hù)是高性能混凝土質(zhì)量形成過程中的重要環(huán)節(jié),直接關(guān)系到其強(qiáng)度發(fā)展的穩(wěn)定性,由于目前高性能混凝土的養(yǎng)護(hù)受到工程環(huán)境和結(jié)構(gòu)部位的影響,單一的養(yǎng)護(hù)方法已經(jīng)不能滿足工程實(shí)際的需求,本文通過不同的養(yǎng)護(hù)方法對高性能混凝土強(qiáng)度和耐久性的影響進(jìn)行對比分析,提出了早期進(jìn)行覆蓋養(yǎng)護(hù),后期進(jìn)行水中浸水的分階段養(yǎng)護(hù)法,同時未來高性能混凝土的養(yǎng)護(hù)方法將向復(fù)合養(yǎng)護(hù)方向發(fā)展,采用多種養(yǎng)護(hù)技術(shù)才能有力保障混凝土的強(qiáng)度和耐久性能。最后本文結(jié)合現(xiàn)有的普通混凝土工程質(zhì)量控制體系和高性能混凝土質(zhì)量形成過程,提出建立了事前控制、事中控制和事后控制的高性能混凝土質(zhì)量控制體系,并從原材料的選擇、配合比的設(shè)計(jì)、混凝土的生產(chǎn)、施工、養(yǎng)護(hù)等環(huán)節(jié)進(jìn)行全面的質(zhì)量控制,各環(huán)節(jié)、各階段遵循動態(tài)控制原理,發(fā)現(xiàn)問題及時糾偏,確保高性能混凝土的質(zhì)量滿足工程建設(shè)的需要
[Abstract]:Since the concept of high performance concrete (HPC) was put forward, people have paid more attention to the development of HPC. However, since HPC is a new technology, it is still in the process of continuous development and improvement. In the process of engineering application, there are still some areas that need to be improved. Scholars from all over the world have also been doing comprehensive research on high performance concrete, which provides technical support for the further popularization and application of high performance concrete. In recent years, the use of high performance concrete in engineering structure has been widely developed, and the use of high performance concrete is huge. However, people generally realize how to give full play to the economic benefits of high performance concrete and improve its comprehensive performance. To ensure the quality of construction and to meet the needs of construction has become an urgent research topic for high performance concrete (HPC). In this paper, the influence of cement, coarse aggregate, admixture and mineral admixture on the comprehensive properties of high performance concrete is studied. The influence of the use and selection of various components of high performance concrete on its performance is analyzed through experimental research. The basic technical requirements for the selection and use of various components of high performance concrete are put forward by comparison and analysis. Because high performance concrete has the characteristics of low water / binder ratio and high workability, it is necessary to select high quality and good quality components in the selection of raw materials, besides cement, aggregate and water traditional basic composition materials. Admixture and mineral admixture must be added. The variety and amount of admixture and mineral admixture have great influence on the performance of high performance concrete. At the same time, the properties of high performance concrete can be improved by double mineral admixture. At the same time, in order to realize the high performance of concrete, in addition to selecting high quality and suitable composition materials, it is also very important to design the proportion of each component material and the mix ratio of concrete. In this paper, the design of mix ratio of high performance concrete is studied, and the basic principles of mix ratio design of high performance concrete are comprehensively analyzed, and the water binder ratio, sand ratio, fly ash, sand ratio and fly ash are selected. Silica fume, as the four main factors affecting the performance of high performance concrete, is designed by orthogonal experimental design. According to the range analysis of the results of orthogonal test, the order of influencing factors is studied. The optimum mix ratio design is put forward. Curing is an important link in the forming process of high performance concrete quality, which is directly related to the stability of its strength development. At present, the maintenance of high performance concrete is affected by the engineering environment and structure position. The single maintenance method can no longer meet the practical requirements of engineering. This paper compares and analyzes the influence of different curing methods on strength and durability of high performance concrete, and puts forward that early coverage maintenance should be carried out. At the same time, the curing method of high performance concrete in the future will be developed towards the direction of composite curing. The strength and durability of concrete can be guaranteed by adopting various curing techniques. Finally, combining with the existing quality control system of ordinary concrete engineering and the forming process of high performance concrete quality, the paper puts forward the establishment of high performance concrete quality control system, which is pre-control, in-process control and post-control. And from the selection of raw materials, mix ratio design, concrete production, construction, maintenance and other links to carry out a comprehensive quality control, each link, each stage of the dynamic control principle, found that the problem timely correction, Ensuring the quality of High performance concrete to meet the needs of Engineering Construction
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU755

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 賀東青;任志剛;;高性能混凝土配合比設(shè)計(jì)方法研究綜述[J];國外建材科技;2006年04期

2 謝堯;劉開之;;高性能混凝土研析[J];華東公路;2010年05期

3 方樂仁;;混凝土外加劑及其應(yīng)用[J];黑龍江科技信息;2010年15期

4 張偉;侯鵬宇;;混凝土外加劑摻量試驗(yàn)[J];河南水利與南水北調(diào);2008年05期

5 郭文山;石亮;;淺談高性能混凝土的養(yǎng)護(hù)[J];江蘇建筑;2009年04期

6 吳中偉;綠色高性能混凝土與科技創(chuàng)新[J];建筑材料學(xué)報(bào);1998年01期

7 張文娜;李立;李青;;淺談自密實(shí)高性能混凝土[J];科技視界;2012年22期

8 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

9 姜自新;;淺議外加劑在混凝土中的應(yīng)用[J];中國石油和化工標(biāo)準(zhǔn)與質(zhì)量;2012年S1期

10 付剛;;淺談減少高性能混凝土坍落度損失的方法[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2009年S1期

，

本文編號：1787349