【導(dǎo)讀】混凝土是一種由砂石骨料、水泥、水及其他多種材料混合而形成的脆性材料。微裂縫通常是一種無害裂縫，對混凝土的承重、抗?jié)B透及其他一些使用功能不。但是在混凝土受到荷載、溫差等多重效應(yīng)作用之后，微裂縫就會不斷的擴。外觀、使用壽命，將會嚴(yán)重威脅到人們的生命和財產(chǎn)安全。裂縫的不穩(wěn)定發(fā)展所致。其危害程度控制在一定的范圍之內(nèi)。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。但在施工中應(yīng)盡量采取有效措施控制裂縫產(chǎn)生，出現(xiàn)，以確保工程質(zhì)量。在實際工程中應(yīng)區(qū)別對待，根據(jù)實際情況解決實際問題。面部位比較多見，較薄的梁板中多沿其短向分布裂紋。冬季施工時要適當(dāng)延長混凝土的保溫覆蓋時間，并涂刷保護劑保護。塑性收縮是指混凝土在凝結(jié)之前，表面因水分蒸發(fā)較快而產(chǎn)生的收縮。影響混凝土塑性收縮開裂的主要因素有水灰比、混。70℃左右甚至更高）。當(dāng)拉應(yīng)力超過混凝土的抗拉強度極限時，混凝土表面就會產(chǎn)生裂縫，這

　　

【正文】 浙江大學(xué)城市學(xué)院畢業(yè)設(shè)計 外文翻譯 The emergence of the crack not only would influence structure of whole with just degree, return will cause the rust eclipse of reinforcing bar, acceleration concrete of carbonization, lower durable and anti of concrete tired, anti Shen according to the property of crack and concrete circumstance we want differentiation to treat, in time processing, with assurance building of safety usage. The repair measure of the concrete crack is main to have the following some method:Surface repair method, infuse syrup, the Qian sew method, the structure reinforce a method, concrete displacement method, electricity chemistry protection method and imitate to living from heal method. Surface repair the method be a kind of simple, familiar of repair method, it main be applicable to stability and to structure loading the ability don39。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 structure whole of repair, it is make use of pressure equipments gum knot the material press into the crack of concrete, gum knot the material harden behind and concrete formation one be whole, thus reinforce of in mon use gum knot material has the cement the syrup, epoxy, A Ji C Xi sour ester and gather ammonia ester to equalize to learn material. The Qian sew a method is that the crack be a kind of most in mon use method in, it usually is follow the crack dig slot, the Qian fill Su in the slot or rigid water material with attain closing crack of in mon use Su material has PVC gum mire, plastics ointment, the D Ji rubber etc.。In mon use rigid water material is the polymer cement sand syrup. The structure reinforce a method When the crack influence arrive concrete structure of function, will consideration adopt to reinforce a method to carry on processing to the concrete structure reinforce medium in mon use main have the following a few method:The piece of enlargement concrete structure in every aspect accumulate, outside the Cape department of the Gou piece 浙江大學(xué)城市學(xué)院畢業(yè)設(shè)計 外文翻譯 pack type steel, adoption prepare should the dint method reinforce, glue to stick steel plate to reinforce, increase to establish fulcrum to reinforce and jet the concrete pensation reinforce. Concrete displacement method Concrete displacement method is processing severity damage concrete of a kind of valid method, this method be first will damage of the concrete pick and get rid of, then again displacement go into new of concrete or other in mon use displacement material have:Common concrete or the cement sand syrup, polymer or change sex polymer concrete or sand syrup. The electricity chemistry protection method The electricity chemistry antisepsis is to make use of infliction electric field in lie the quality of electricity chemical effect, change concrete or reinforced concrete the environment appearance of the place, the bluntness turn reinforcing bar to attain the purpose of protection method, chlorine salt39。s withdrawing a method, alkalescence to recover a method is a chemistry protection method in three kinds of in mon use but valid advantage of this kind of method is a protection method under the influence of environment factor smaller, apply reinforcing bar, concrete of longterm antisepsis, since can used for crack structure already can also used for new set up structure. Imitate to living from legal more Imitate to living from heal the method be a kind of new crack treatment, its mimicry living creature organization secrete a certain material towards suffering wound part auto, but make the wound part heal of function, join some and special position(such as contain to glue knot of the liquid Xin fiber or capsule) in the concrete of the tradition the position, at concrete inner part formation the intelligence type imitate to living from heal nerve work system, be the concrete appear crack secrete a parts of liquid Xin fiber can make the crack re heal. 4 Conclusion The crack is widespread in the concrete structure existence of a kind of phenomenon, it of emergence not only will lower the anti Shen of building ability, influence building of usage function, and will cause the rust eclipse of reinforcing bar, the carbonization of concrete, lower the durable of material, influence building of loading ability, so want to carry on to the concrete crack earnest research, differentiation treat, adoption reasonable of the method carry on processing, and at under construction adopt various valid of prevention 浙江大學(xué)城市學(xué)院畢業(yè)設(shè)計 外文翻譯 measure to prevention crack of emergence and development, assurance building and Gou piece safety, stability work.