【正文】 without fail reliably in receiving long time will connect using special use glue to paste. When only think that concreting accepts. Dismantling model and curing of concrete The waterproof concreting queen maintains goodness and badness working, not only affecting the intensity arriving at a concrete, moreover the impervious function affecting to the concrete. Evidence, waterproof concrete early phase dehydration or curing process lack for water, will reduce whose impervious function by a wide margin. Waterproof concrete curing responds to the block of wood less than 14 ds. The waterproof concrete dismantles a model demanding to be unable to pare high, dismantle model time unsuitable untimely, respond to when dismantling a model handle meticulously, prevent an iron rod from using to pry, stiffly, that the sledgehammer is knocked suddenly and forcibly pries , uses a concrete meet with destroy. Do good well at backfill Conclusions Construction temperature and relation of crack in concrete the above carry on preliminary discussion of theory and practice, though the academia has different theories to origin cause of formation and puting technology of the concrete crack, but to concrete prevention and improving the measure suggestion to relatively unify, application in practice result fine too at the same time, concrete to is it observe, pare more more by us to want in constructing, analyse more, summarize more after going wrong, bine many kinds of prevention and deal with the measure, the crack of the concrete can be avoided. 淺談混凝土的施工過(guò)程中溫度與裂縫控制 摘 要 為了防止業(yè)主對(duì)混凝土工程的索賠 ,就必須做好施工過(guò)程中溫度與裂縫控制。首先，在施工中混凝土常常出現(xiàn)溫度裂縫，影響到結(jié)構(gòu)的整體性和耐久性。 （ 3）晚期：混凝土完全冷卻以后的運(yùn)轉(zhuǎn)時(shí)期。 （ 4）減水防裂劑可以改善水泥漿的稠度，減少混凝土泌水，減少沉縮變形。 施工質(zhì)量控制 結(jié)合 經(jīng)驗(yàn) ，對(duì)模板的設(shè)計(jì)、制作安裝、鋼筋綁扎、混凝土澆筑及養(yǎng)護(hù)等關(guān)鍵工序的操作要點(diǎn)進(jìn)行了闡述，并介紹了成型后混凝土的質(zhì)量控制標(biāo)準(zhǔn)，以降低工程造價(jià)，具有很好的經(jīng)濟(jì)和社會(huì)效益。 (3)施工過(guò)程中應(yīng)定期抽查測(cè)定混凝土坍落度，施工中如遇下雨或其他原因，砂石含水量發(fā)生變化時(shí)，應(yīng)及時(shí)測(cè)定其含水率，并調(diào)整施工配合比。 4． 5 施工縫作法 施工縫是防水結(jié)構(gòu)的薄弱環(huán)節(jié)之一。 4． 7 做好回填土 結(jié)束語(yǔ) 以上對(duì)混凝土的施工溫度與裂縫之間的關(guān)系進(jìn)行了理論和實(shí)踐上的初步探討，雖然學(xué)術(shù)界對(duì)于混凝土裂縫的成因和計(jì)算方法有不同的理論，但對(duì)于具體的預(yù)防和改善措施意見(jiàn)還是比較統(tǒng)一，同時(shí)在實(shí)踐中的應(yīng)用效果也是比較好的，具體施工中要靠我們 多觀察、多比較，出現(xiàn)問(wèn)題后多分析、多總結(jié)，結(jié)合多種預(yù)防處理措施，混凝土的裂縫是完全可以避免的。采用止水鋼板時(shí)不得有漏焊，采用橡膠止水帶在接長(zhǎng)時(shí)務(wù)必要將接頭用專用膠水粘貼牢固可靠。 (2)嚴(yán)格做到定點(diǎn)定量下料。 (2)鋼筋接頭應(yīng)盡量采用焊接接頭，盡量少用和不用綁扎接頭。 （ 7）摻加外加劑可使混凝土密實(shí)性好，可有效地提高混凝土的抗碳化性，減少碳化收縮。增大毛細(xì)孔徑可降低毛 細(xì)管表面張力，但會(huì)使混凝土強(qiáng)度降低。 溫度應(yīng)力的分析 根據(jù)溫度應(yīng)力的形成 過(guò)程可分為以下三個(gè)階段： （ 1）早期：自澆筑混凝土開(kāi)始至水泥放熱基本結(jié)束，一般約 30 天。盡管我們?cè)谑┕ぶ胁扇「鞣N措施，小心謹(jǐn)慎，但裂縫仍然時(shí)有出現(xiàn)。t be ignored on the stress state of the structure. We meet to construct temperature crack in mainly, so only to origin cause of formation and treatment measure, concrete of crack make a discussion in constructing this text. 1. Reason of a crack Have many kinds of reasons to produce the crack in the concrete, it is mainly the changes of temperature and humidity, fragility and disparity of the concrete, and the structure is unreasonable, the raw materials is not up to standard (if the alkali aggregate react), the template is out of shape, the foundation does not subside etc. evenly . 2. Analysis of temperature stresses Can be divided into following three stages according to the forming process of the temperature stress: (1) It is early: Build concrete is it is it over basically to send out heat to cement to begin , generally one one day by oneself. Two characteristics at this stage, first, the cement emits a large amount of heat of hydration, second , mix and congeal the changing sharply of elastic model quantity. Because of the change of elastic model quantity , form the remaining stress in th