【正文】 ect to protect. Five is a constitution the acmodation is in the concrete structure of the constringency sew. The Su constringency crack and prevention Su constringency is the concrete is before condense, surface because of lose water quicker but creation of constringency. The Su constringency crack is general at dry heat or strong wind the weather appear, crack39。四是鋼筋表層涂刷防腐涂料。這種裂縫一般出現(xiàn)中混凝土結(jié)構(gòu)使用期間，一旦出現(xiàn)很難補(bǔ)救，因此應(yīng)在施工中采取有效措施進(jìn)行預(yù)防。十是加強(qiáng)混凝土溫度的監(jiān)控，及時(shí)采取冷卻、保護(hù)措施。二是減少水泥用量， 將水泥用量盡量控制在 450kg/m3 以下。 由于混凝土的體積較大，大量的水化熱聚積在混凝土內(nèi)部而不易散發(fā) 出來 ，導(dǎo)致 混凝土 內(nèi)部溫度急劇上升，而混凝土表面散熱較快，這樣就形成內(nèi)外的較大溫差，較大的溫差造成內(nèi)部與外部熱脹冷縮的程度不同，使混凝土表面產(chǎn)生一定的拉應(yīng)力。地基變形穩(wěn)定之后，沉陷裂縫也基本趨于穩(wěn)定。三是澆筑混凝土之前，將基層和模板澆水均勻 直至 濕透。冬季施工時(shí)要適當(dāng)延長混凝土 的保溫覆蓋時(shí)間，并涂刷保護(hù)劑保 護(hù)。相對 濕度越低，水泥漿體干縮越大，干縮裂縫越易產(chǎn)生。近代科學(xué)研究和大量的混凝土工程實(shí)踐證明，在混凝 土工程中裂縫問題是不可避免的，在一定的范圍內(nèi)也是可以接受的，但 要采取有效的措施將其危害程度控制在一定的范圍之內(nèi)。 畢業(yè)設(shè)計(jì)（論文） 譯文及原稿 譯文題目 建筑混凝土裂縫的預(yù)防和處理 原稿題目 Building construction concrete crack of prevention and processing 原稿出處 Dimosi M， CANADIAN JOURNAL OF CIVIL ENGINEERING， [M]， Canadian： The Canadian civil engineering press， 2020. 浙江大學(xué)城市學(xué)院畢業(yè)設(shè)計(jì) 外文翻譯 建筑混凝土裂縫的預(yù)防與處理 摘 要： 混凝土的裂縫問題是一個(gè)普遍存在而又難以解決的工程實(shí)際問題，本文將對混凝土工程中熟悉的裂縫問題進(jìn)行研究分析，并針對具體情況提出一些預(yù)防與處理措施。鋼筋混凝土規(guī)范 明文規(guī)定：不同結(jié)構(gòu)在不同的所處條件下 ，允許存在一定寬度的裂縫。干縮裂縫多為表面的平行線狀或網(wǎng)狀淺細(xì)裂縫，寬度一般 在 之間， 在 大體積混凝土中 的 平面部位 比較 多見，較薄的梁板中多沿其短向分布 裂紋 。五是在混凝土結(jié)構(gòu)中設(shè)置合適 的收縮縫。四是及時(shí)覆蓋塑料薄膜或者潮濕的草墊、麻片等，保持混凝土終凝前表面濕潤，或者在混凝土表面噴灑養(yǎng)護(hù)劑等進(jìn)行養(yǎng)護(hù)。 主要預(yù)防措施：一是對松軟土、回填土地基在上部結(jié)構(gòu)施工前應(yīng)進(jìn)行必 要的夯實(shí)和加固。當(dāng)拉應(yīng)力超過混凝土的抗拉強(qiáng)度極限時(shí)，混凝土表面就會產(chǎn)生裂縫，這種裂縫多發(fā)生在混凝土施工中后期。三是降低水灰比，一般混凝土的水灰比控制在 以下。十一是預(yù)留溫度收縮縫。主要的預(yù)防措施：一是選用堿活性小的砂石骨料。 浙江大學(xué)城市學(xué)院畢業(yè)設(shè)計(jì) 外文翻譯 Building constructing concrete crack of prevention and processing Abstract： The crack problem of concrete is a widespread existence but again difficult in solve of engineering actual problem, this text carried on a study analysis to a little bit familiar crack problem in the concrete engineering, and aim at concrete the circumstance put forward some prevention, processing measure. Key word: Concrete crack prevention processing 1 Foreword Concretes is a kind of anticipate by the freestone bone, cement, water and other mixture but formation of the in addition material of quality brittleness not and all material. Because the concrete construction transform with oneself, control etc. a series problem, harden model of in the concrete existence numerous tiny hole, spirit cave and tiny crack, is exactly because these beginning start blemish of existence just make the concrete present one some not and all the characteristic of quality. The tiny crack is a kind of harmless crack and accept concrete heavy, defend Shen and a little bit other use function not a creation to endanger. But after the concrete be subjected to lotus carry, difference in temperature etc. function, tiny crack would continuously of expand with connect, end formation we can see without the aid of instruments of macro view the crack be also the crack that the concrete often say in the engineering. Concrete building and Gou piece usually all take sewer to make of, because of crack of existence and development usually make inner part of reinforcing bar etc. material creation decay, lower reinforced concrete material of loading ability, durable and anti Shen ability, influence building of external appearance, service life, severity will threat arrive people39。s much presenting in the center breadth, both ends be in the centerthin and the length be different, with each other not coherent crack general long 2030 cm, the longer crack can reach to a 23 m, breadth 15 creation of main reason is:The concrete is eventually almost having no strength or strength before the Ning very small, perhaps concrete just eventually Ning but strength very hour, be subjected to heat or pare strong wind dint of influence, the concrete surface lose water to lead quick, result in in the capillary creation bigger negative press but make a concrete physical volume sharply constringency, but at this time the strength of concrete again can39。s etc. overlay, and attention sprinkle water to protect, appropriate extension protect time, assurance the concrete surface be slowmoving cool off. At the cold season, concrete surface should constitution heat preservation measure, in order to prevent cold wave is the allocation be a little amount in the concrete of reinforcing bar perhaps add fiber material concrete of temperature crack control at certain of scope inside. Crack and prevention that the chemical reaction cause Alkali bone39。t have the surface crack of influence and deep enter crack of processing measure that is usually is a surface in crack daubery cement syrup, the wreath oxygen gum mire or at concrete surface Tu2 Shua paint, asphalt etc. antisepsis material, at protection of in the meantime for keeping concrete from continue under the influence of various function to open crack, usually can adoption the surface in crack glue to stick glass fiber cloth etc. measure. Infuse syrup, the Qian sew method Infuse a syrup method main the concrete crack been applicable to have influence or have already defend Shen request to the str