freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

外文翻譯--再生改性混凝土的性能(完整版)

  

【正文】 ablished policies, the development of new technology, in order to promote the construction waste especially recycling old concrete utilization. According to statistics, since the 9039。 shrinkage pensation 1 Introduction In today39。 recycled aggregate medium strength concrete, the strength of recycled aggregate concrete and influence。對(duì)這些廢舊混凝土進(jìn)行回收利用符合可持續(xù)發(fā)展戰(zhàn)略的要求,能帶來(lái)顯著的社會(huì)、經(jīng)濟(jì)和環(huán)境效益,由此興起的再生混凝土技術(shù)已成為許多發(fā)達(dá)國(guó)家的重要研究課題。而混凝土中砂石骨料占總質(zhì)量的 70%以上。混凝土膨脹劑主要用來(lái)配制膨脹混凝土 (包括補(bǔ)償收縮混凝土和自應(yīng)力混凝土 ),補(bǔ)償收縮混凝土具有補(bǔ)償混凝土干縮和密實(shí)混凝土、提高混凝土抗?jié)B性作用,在土木工程中主要用于防水和抗裂兩個(gè)方面,現(xiàn)在使用較多的場(chǎng)合是配制高等級(jí)防水混凝土和適當(dāng)延長(zhǎng)伸縮縫或后澆帶間距。 再生混凝土的力學(xué)性能 再生混凝土的強(qiáng)度與基體混凝土的強(qiáng)度、再生骨料破碎工藝、再生骨料的取代率以及再生混凝土的配合比等密切相關(guān)。 3) 再生混凝土與天然骨料混凝土相比,其干縮量和徐變量平均增加約為 60%??梢灶A(yù)見(jiàn)在相當(dāng)長(zhǎng)的一個(gè)時(shí)期內(nèi),混凝土技術(shù)領(lǐng)域還不可能出現(xiàn)替代補(bǔ)償收縮混凝土的新技術(shù),因此旨在提高性能,減免裂縫的補(bǔ)償收縮混凝土具有廣闊的發(fā)展前景,但需要與時(shí)俱進(jìn),不斷創(chuàng)新。因此,為推廣再生混凝土,使其能在結(jié)構(gòu)混凝土中應(yīng)用,需進(jìn)一步研究提高再生混凝土的強(qiáng)度途徑,降低再生混凝土的收縮和徐變方法,研究再生混凝土的微觀結(jié)構(gòu)和破壞機(jī)理。對(duì)于不同強(qiáng)度等級(jí)的再生混凝土,再生骨料的來(lái)源和性質(zhì)對(duì)其強(qiáng)度的影響程度不同:配制高強(qiáng)再生混凝土?xí)r,再生骨料的來(lái)源和性質(zhì)對(duì)再生混凝土的強(qiáng)度影響最大;配制中等強(qiáng)度的再生骨料混凝上時(shí),其對(duì)再生混凝土的強(qiáng)度影響次之;而配制低強(qiáng)度的再生骨料混凝土?xí)r,其對(duì)再生混凝上的強(qiáng)度影響很小。膨脹混凝 土轉(zhuǎn)入干空 (RH = 60 177。 膨脹劑 物理化學(xué)性能:混凝土膨脹劑是指其在混凝土拌制過(guò)程中與水泥、水拌和后經(jīng)水化反應(yīng)生成鈣礬石 [3CaO據(jù)統(tǒng)計(jì),工業(yè)固體廢棄物中 40%是建筑業(yè)產(chǎn)生的,廢棄混凝土是建筑業(yè)制造出的最大的廢棄物。 關(guān)鍵詞 :生態(tài)環(huán)境;再生骨料;基本性能;補(bǔ)償收縮 1 引言 當(dāng)今世界,環(huán)境問(wèn)題日益凸顯,可持續(xù)發(fā)展被提上日程。 5%) curing shrinkage, too, but then return maintenance, and can restore the previous expansion. Drying shrinkage As with ordinary concrete, shrinkage pensating concrete will also occur in air drying shrinkage, factors affecting the drying shrinkage of concrete with ordinary roughly the same, but the relative humidity of the external factors, internal factors of water binder ratio is more important. Under the same conditions, drying shrinkage fall of shrinkage pensating concrete and mon concrete in roughly the same. Recycled concrete Strength with the matrix concrete of recycled concrete strength, regeneration substitution rate and recycled concrete mixture ratio is closely related to aggregate crushing technology, recycled aggregate. Due to the strength of concrete, the matrix using environment and carbonization degree each are not identical, differences of disintegration, crushing process and quality control measures, resulting in regular changes of concrete strength regeneration is poor, different researchers have different conclusions. Test results show that: 1) the pressive strength of recycled concrete is lower than the pressive strength of natural aggregate concrete ratio, reduce the range of 0%~30%. Improve and strength of recycled aggregate concrete with strength of recycled aggregate concrete matrix increased。中文 3074 字 畢業(yè)設(shè)計(jì) (論文 )外文資料翻譯 系 別: 建筑工程系 專(zhuān) 業(yè): 土木工程 班 級(jí): 姓 名: 學(xué) 號(hào): 外文出處: 漢斯國(guó)際期刊土木欄 附 件: 1. 原文 ; 2. 譯文 2020 年 12 月 29 日 原 文 : The Regeneration Performance of Modified Concrete Abstract: the removal of the original building, to make use of the abandoned concrete, can Protect environment and related
點(diǎn)擊復(fù)制文檔內(nèi)容
畢業(yè)設(shè)計(jì)相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
備案圖鄂ICP備17016276號(hào)-1