天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 科技論文 > 路橋論文 >

干硬性混凝土路緣石的應(yīng)用研究

發(fā)布時(shí)間:2018-02-24 04:50

  本文關(guān)鍵詞: 干硬性混凝土 路緣石 配合比設(shè)計(jì) 耐久性 抗氯離子滲透 出處:《吉林大學(xué)》2015年碩士論文 論文類型:學(xué)位論文


【摘要】:近年來我國交通基礎(chǔ)設(shè)施發(fā)展迅猛,各級(jí)公路建設(shè)如火如荼。路緣石作為道路結(jié)構(gòu)中的重要組成部分,需求量也在不斷增大。路緣石的設(shè)置不僅起到導(dǎo)向、連接和便于排水的作用,而且對(duì)于路面施工及路肩的穩(wěn)定有一定幫助,因而其耐久性關(guān)系著公路的暢通和運(yùn)行安全。目前常用的路緣石有巖石類路緣石和混凝土類路緣石,巖石類路緣石力學(xué)性能好、耐腐蝕,但造價(jià)高,很難在公路上大規(guī)模應(yīng)用。而混凝土預(yù)制塊路緣石抵御自然氣候條件連續(xù)凍融破壞和除雪劑所造成的腐蝕破壞能力較差,導(dǎo)致使用壽命短,養(yǎng)護(hù)維修成本較高。干硬性混凝土具有水灰比低、早期強(qiáng)度高及成型速度快等特點(diǎn),因而在壓實(shí)成型后可立即拆模提升模板周轉(zhuǎn)速率與生產(chǎn)效率。干硬性混凝土的高效率與經(jīng)濟(jì)性使其在土木工程中得到了廣泛應(yīng)用,但是其在路緣石的應(yīng)用研究上還未成熟。為了進(jìn)一步推廣干硬性混凝土路緣石的應(yīng)用,提升其耐久性,本文對(duì)干硬性混凝土路緣石進(jìn)行了系統(tǒng)的試驗(yàn)研究,具體研究?jī)?nèi)容及成果如下:本文首先從干硬性混凝土的配合比設(shè)計(jì)入手,通過對(duì)混凝土級(jí)配設(shè)計(jì)理論以及配合比設(shè)計(jì)方法的比選,根據(jù)最大密度曲線理論進(jìn)行級(jí)配的計(jì)算及評(píng)價(jià)分析。因?yàn)楦捎残曰炷了冶容^低,成型方式與普通混凝土有所區(qū)別,因此其配合比設(shè)計(jì)不能簡(jiǎn)單的采用普通混凝土相關(guān)設(shè)計(jì)方法。本文參照《現(xiàn)代混凝土配合比設(shè)計(jì)手冊(cè)》中相關(guān)方法,并結(jié)合試驗(yàn)驗(yàn)證,最后得到力學(xué)性能較優(yōu)的路緣石生產(chǎn)配合比。干硬性混凝土采用振動(dòng)壓實(shí)成型,從而保證其能夠成型后立即脫模,并通過蒸汽養(yǎng)生,保證其早期強(qiáng)度的快速形成。因而干硬性混凝土路緣石的制備工藝及養(yǎng)生工藝對(duì)其成品質(zhì)量的好壞有著重要影響。本文結(jié)合吉林久盛生態(tài)環(huán)境科技股份有限公司自主設(shè)計(jì)制造的混凝土砌塊成型機(jī)生產(chǎn)干硬性混凝土路緣石,通過對(duì)其生產(chǎn)過程及養(yǎng)護(hù)過程中主要影響參數(shù)進(jìn)行分析,充分發(fā)揮該成型機(jī)特點(diǎn),使得各參數(shù)組合后得到最大的生產(chǎn)效率與生產(chǎn)質(zhì)量。對(duì)初選得到的兩組干硬性混凝土路緣石配合比試件耐久性能進(jìn)行試驗(yàn)研究,分析其抗凍融性能與抗氯離子滲透性能,對(duì)其耐久性進(jìn)行評(píng)價(jià),并比選出最終干硬性混凝土生產(chǎn)配合比。試驗(yàn)結(jié)果表明兩組配合比試件性能均能滿足使用要求,其中水灰比為0.37時(shí)配合比制備試件性能更好。最后結(jié)合安龍泉互通立交橋建設(shè)工程,鋪設(shè)干硬性混凝土路緣石試驗(yàn)段對(duì)其使用性能進(jìn)行了驗(yàn)證。通過跟蹤調(diào)查發(fā)現(xiàn),干硬性混凝土路緣石應(yīng)用效果良好,其抗凍融破壞耐久性比普通混凝土要好,具有長(zhǎng)期穩(wěn)定性,適用于東北等季節(jié)性凍土區(qū)。
[Abstract]:In recent years, the traffic infrastructure in China has developed rapidly, and highway construction at all levels is in full swing. As an important part of the road structure, the demand for the road-edge stone is also increasing. The installation of the road-edge stone not only plays a guiding role, The connection and convenience of drainage are helpful to the road construction and the stability of the road shoulder, so its durability is related to the smooth and safe operation of the highway. At present, the commonly used kerbstones are rock kerbstones and concrete kerbstones. Rock kerbstones have good mechanical properties and corrosion resistance, but they are difficult to be used in large scale on highway because of their high cost. However, concrete precast kerbstones have poor ability to resist continuous freezing and thawing damage in natural climate and corrosion damage caused by snow removal agents. As a result, the service life is short, the maintenance cost is high, the dry hard concrete has the characteristics of low water-cement ratio, high early strength and fast forming speed, etc. Therefore, the mould can be removed immediately after compaction to raise the turnover rate and production efficiency of the formwork. The high efficiency and economy of dry hard concrete make it widely used in civil engineering. In order to further popularize the application of dry-hard concrete kerbstone and improve its durability, a systematic experimental study on dry-hard concrete kerbstone is carried out in this paper. The specific research contents and results are as follows: firstly, this paper starts with the mix ratio design of dry-hard concrete, compares and selects the concrete gradation design theory and the mix proportion design method. According to the theory of maximum density curve, the gradation calculation and evaluation analysis are carried out. Because dry hard concrete is relatively low in water ash, the forming method is different from that of ordinary concrete. Therefore, the mix ratio design can not simply adopt the common concrete related design method. This paper refers to the correlation method in the Design Manual of Modern concrete mix ratio, and combines with the test to verify, Finally, the compaction ratio of road edge stone with better mechanical properties is obtained. The dry hard concrete is formed by vibration compaction, so as to ensure that it can be moulded immediately after forming, and can be preserved by steam. Therefore, the preparation technology and health preservation technology of dry hard concrete roadway edge stone have an important influence on the quality of its finished products. This paper combines with Jilin Jiusheng Ecological Environment Science and Technology Co., Ltd. The self-designed and manufactured concrete block forming machine produces dry hard concrete road edge stone, Through the analysis of the main influence parameters in the process of production and maintenance, the characteristics of the molding machine are brought into full play. The maximum production efficiency and production quality are obtained by the combination of various parameters. The durability of two groups of dry and hard concrete compounding specimens obtained from the primary selection is studied, and the freeze-thaw resistance and chloride ion permeation resistance are analyzed. The durability of the concrete is evaluated, and the final mix ratio of dry and hard concrete is selected. The test results show that the performance of the two groups of matched specimens can meet the requirements of application. When the water-cement ratio is 0.37, the performance of the sample is better. Finally, the performance of the test piece is verified by laying dry hard concrete roadway edge stone in the construction project of Anlongquan Interchange Bridge. The pavement edge stone of dry-hard concrete has good application effect, its durability of freeze-thaw damage is better than that of ordinary concrete, it has long-term stability and is suitable for seasonal frozen soil areas such as Northeast China.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 沙克;黃艷春;;預(yù)養(yǎng)時(shí)間對(duì)蒸養(yǎng)混凝土耐久性的影響[J];低溫建筑技術(shù);2011年07期

2 錢覺時(shí);徐姍姍;李美利;王立霞;;混凝土電阻率測(cè)量方法與應(yīng)用[J];山東科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年01期

3 Viktor Mechtcherine;Ulnich Palzer;崔玉忠;;干硬性混凝土制品生產(chǎn)工藝與技術(shù)的現(xiàn)狀[J];建筑砌塊與砌塊建筑;2010年02期

4 張士萍;鄧敏;吳建華;唐明述;;孔結(jié)構(gòu)對(duì)混凝土抗凍性的影響[J];武漢理工大學(xué)學(xué)報(bào);2008年06期

5 魏小勝;夏玉英;王延偉;;用電阻率法評(píng)定混凝土的氯離子滲透[J];華中科技大學(xué)學(xué)報(bào)(城市科學(xué)版);2008年02期

6 黃世謀;趙新亞;;混凝土材料的歷史與發(fā)展[J];三門峽職業(yè)技術(shù)學(xué)院學(xué)報(bào);2007年03期

7 李星楠,劉洪岫,郭玉濤;干硬性混凝土彩色路面磚的強(qiáng)度試驗(yàn)研究[J];黑龍江水專學(xué)報(bào);2003年03期

8 王繼宗,梁曉穎,梁賓橋;混凝土配合比設(shè)計(jì)方法的研究進(jìn)展[J];河北建筑科技學(xué)院學(xué)報(bào);2003年02期

9 蘭文慶;干硬性混凝土在圓管預(yù)制工作中的作用[J];甘肅科技縱橫;2003年03期

10 王建國;干硬性混凝土在上海浦東國際機(jī)場(chǎng)場(chǎng)道工程中的應(yīng)用[J];中國港灣建設(shè);1999年02期

相關(guān)會(huì)議論文 前1條

1 張德成;張鳴;肖傳明;張?jiān)骑w;葉正茂;劉福田;;干硬性混凝土彩色透水路面磚的設(shè)計(jì)[A];中國硅酸鹽學(xué)會(huì)混凝土水泥制品分會(huì)第七屆理事會(huì)議暨學(xué)術(shù)交流大會(huì)論文集[C];2005年

,

本文編號(hào):1528943

資料下載
論文發(fā)表

本文鏈接:http://www.sikaile.net/kejilunwen/daoluqiaoliang/1528943.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶065fb***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請(qǐng)E-mail郵箱bigeng88@qq.com