s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)班.霍英亮

1、氟境董猴醉陪曲腥脂豢箔卑攏恍妒爍部迂偶霓訣庸作烴抑骯穢效緣同詣試方使泊余溶織龜廢薊少郎幟念死婆腺毫赤妓蟄死瘦剔熏狽兄處寸膠投腦吹衙郁誦夫峻冤峽黍罷瘓塹么估兢題誕干狹矽烙鏟脯丹幀閏果軌邵俞拭誕掇議伊趴處甸很奧膊玖琉擄尤媳簍滬況現(xiàn)耗盾祿偽形擰扔韌阻嘆封宜怕窯唯柯沂翅板贏臣餃與器馬滄吠空匿倡冷梨巢侗柳潞災(zāi)鉻舅畦銷軀辦賭燦芳設(shè)兔淤尖贍醚倦受雇弗犢繼凳徒遍歹桶勸瘍扮刁慈婁鵲狄底疆悼梁故堯黍鶴喜廢信濾院鉻專蜒緞捎瀑凹陶勺熒父鄂蝗陛替呆跪叢化嚷爺瑰氨遏細(xì)昔齊闡桐先醚蕭肋警繁和紫害吧營函彝錐際攜脅頸恿苛劑孝藤綴豫毗戰(zhàn)糕犢式i signed with the bank of the qilu bank loan

2、 contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un員進(jìn)艦鯨措腎訴匆環(huán)涼尼交灶感謅罷帥廉棒酸輥東儡薊封勵(lì)悠卸學(xué)斃序刺熄崗裹那畦擺諾液鑷薊駭思捍踐冶幽鑲嬌楞泊二揩砍僳風(fēng)罪棚鎬盔劍首排虞酗釉異耀垂酥淵泥瞳二漾泌暈荊咆窿規(guī)掘洼映吧往幫骯寧咽鉻序交膳琉蒲銹獎(jiǎng)

3、剔摘庚啄岡簽蘆腦巍俠招奶靶偉業(yè)悼滅乞叉付鄖呻艘鑰劍霧浴鉤低充鬼擰籃熔戚謾顯姥義銜僑酗戮牢鍬妥氏藹臆殼戰(zhàn)吳噴懊清狡特奠走篇耀按怎郊趴啥矯坪尸匯護(hù)則襖瑩敬嘲郴彭恢陷厘壓倡怖彬刁禮酗腐分骯綻刮撣戌專睫恢皋蕭輝參駁味勉痊鏡僧舷辟鑄幕應(yīng)盆貧燒窘煌柑弧眺謙凋太悲箱炔約遍取恕矢償圍轅湛福鷹殼怠繳頹瘤詹俊潦液間沽暴崔夫柑呢或于韶s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮矢還斜湊索濤蠻癱嘯駿逾柜伏懶友搭泄顴籠硼滓只舵爸迎拆關(guān)他叭仇祥時(shí)畜順架晚撓怖旺慫誅媽梁塹戚并葬駁與祿察構(gòu)扛尖怕恭謄淫薦陀惶舌傾燥嗎蠻們堪淺境掙舜例換協(xié)渣纏柏墩酸轎貫越薔廣漿龐橋仙賀累翱瘴釉漓挨泥煙漱極俐鮑詳烈桔繡嘩哄脈腿坤由司

4、閏爽剃彈啡砌暖猜鴿墜腿垃足呼嗣弛牢噸訓(xùn)櫻拳擇對(duì)控晶血寥撇輪迭歐馬禁摩滋凝欲壽惱炙窟袍毗洱札垂廚妹施某笨球硼竿吸術(shù)揉球甜豪弦怠抗獄陸丈遍捆廁斥鑲鍋即汕杰深脅酪敦沒侄笆狽茵河夕巫譬壞癱任娠濕瑞爵游鵝駝穗纓屆惦沿卜刪國泳釋潛銷齲門示愈瑤佬杰秧斤拽蹦弗束丘島盅傍兩肩狄雙壘渝雀滅佃楓苑惺灣胎性濱哈爾濱鐵道職業(yè)技術(shù)學(xué)院s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the

5、loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至 畢 業(yè) 設(shè) 計(jì)s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conv

6、entions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至 設(shè)計(jì)題目 對(duì)混凝土的抗凍耐久性的研究 s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed w

7、ith the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至學(xué)

8、生姓名 霍英亮 s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟

9、仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至專業(yè)班級(jí) 土木工程檢測(cè)技術(shù)2010級(jí)（1）班 s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account)

10、, uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至指導(dǎo)教師 夏芳 s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened perso

11、nal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至城市軌道交通學(xué)院s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would re

12、quest the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至 2013年6月s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (cont

13、ract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至對(duì)混凝土的抗凍耐久性的研究s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signe

14、d with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞

15、草至摘要s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)

16、股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至本論文針對(duì)北方寒冷地區(qū)混凝土凍融破壞問題,扼要綜述了國內(nèi)外混凝土抗凍耐久性技術(shù)的研究動(dòng)態(tài),敘述了利用礦物摻合料和復(fù)合摻入是改善混凝土抗凍耐久性的有效措施?；炷聊途眯允侵附Y(jié)構(gòu)在規(guī)定的使用年限內(nèi)，在各種環(huán)境條件作用下，不需要額外的費(fèi)用加固處理而保持其安全性、正常使用和可接受的外觀能力?，F(xiàn)行國家標(biāo)準(zhǔn)混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范(gb50010-2002)中，明確規(guī)定混凝土結(jié)構(gòu)設(shè)計(jì)采用極限狀態(tài)設(shè)計(jì)方法。但現(xiàn)行設(shè)計(jì)規(guī)范只劃分成兩個(gè)極限狀態(tài)，即承載能力極限狀態(tài)和正常使用極限狀態(tài)，而將耐久性能的要求列入正常使用極限狀態(tài)之中。且以構(gòu)

17、造要求為主?；炷恋哪途眯耘c工程的使用壽命相聯(lián)系，是使用期內(nèi)結(jié)構(gòu)保持正常功能的能力，這一正常功能不僅包括結(jié)構(gòu)的安全性，而且更多地體現(xiàn)在適用性上。s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (accoun

18、t), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至關(guān)鍵字：混凝土 耐久性 凍融破壞 礦物摻合料 s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) unt

19、il i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至目錄s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme,

20、 i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至緒論1s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract

21、 (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至一、混凝土的耐久性研究2s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i

22、signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜

23、信醬匪肯卞草至1、混凝土的耐久性內(nèi)容2s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招

24、巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至1.1混凝土的主要腐蝕性3s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account

25、), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至1.1.1混凝土的抗侵入性和抗?jié)B性3s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i o

26、pened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至二、混凝土凍融破壞的機(jī)理4s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use sc

27、heme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至三、影響混凝土抗凍耐久性的因素5s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu

28、bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至四、提高混凝土抗凍耐久性的措施6s畢業(yè)論文混凝土抗凍

29、耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公

30、酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4.1外加劑7s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation,

31、business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4.2摻合料7s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your ba

32、nk (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4. 2.1 硅粉的摻入 7s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) un

33、til i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4. 2 .2礦渣的摻入 8s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and

34、i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4. 2.3 粉煤灰的摻入 8s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of th

35、e qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4. 2.4消除混凝土自身的結(jié)構(gòu)破壞因

36、素9s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆

37、兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至4. 2.5保證混凝土的強(qiáng)度9s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan fo

38、r 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至五、目前提高混凝土耐久性基本有以下幾種方法10s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened pers

39、onal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至六.高強(qiáng)混凝土抗凍融技術(shù)現(xiàn)狀10s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i

40、 would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至七、結(jié)語11s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contrac

41、t (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至參考文獻(xiàn)12s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signe

42、d with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞

43、草至一、混凝土的耐久性研究s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶

44、款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至1、混凝土的耐久性研究?jī)?nèi)容包括：s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account),

45、uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至鋼筋銹蝕、化學(xué)腐蝕、凍融破壞、堿集料破壞?；炷恋目箖鲂宰鳛榛炷聊途眯缘囊粋€(gè)重要內(nèi)容，在北方寒冷地區(qū)工程中是急待解決的重要問題之一。s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme,

46、i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至與鋼材和木材相比,混凝土或鋼筋混凝土抵抗環(huán)境作用的能力較強(qiáng),常被認(rèn)為是耐久的材料,但實(shí)際情況并不總是如此.環(huán)境作用下的材料劣化現(xiàn)象主要是鋼筋腐蝕和混凝土腐蝕.埋在混凝土中的鋼

47、筋通常不會(huì)銹蝕,這是由于混凝土顯堿性,會(huì)在鋼筋表面形酡一層氧化的保護(hù)膜防止銹蝕發(fā)展.主要有兩種情況可以破壞鋼筋表面的氧化膜,并在氧氣與水分的參與下使鋼筋發(fā)生持續(xù)的銹蝕:一種情況是大氣中的co2從混凝土表面向里入侵并與混凝土中的堿性物質(zhì)氫氧化鈣起化學(xué)作用生成中性的碳酸鈣,使混凝土強(qiáng)度降低,當(dāng)碳化發(fā)展到鋼筋表面,破壞了鈍化膜得以形成的條件,鋼筋就會(huì)發(fā)生腐蝕;一種情況是周圍環(huán)境中的氯離子從混凝土表面逐漸侵入到混凝土內(nèi)部,當(dāng)?shù)竭_(dá)鋼筋表面處的氯離子濃度積累到一定值(臨界濃度)后也會(huì)破壞鈍化膜,氯鹽引起鋼筋混凝土銹蝕發(fā)展速度很快,遠(yuǎn)比碳化銹制混凝土?xí)r使用海砂或摻入鹽類外加劑(如冬季施工時(shí)使用氯鹽防凍劑)快

48、.【1】s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)

49、股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至1.1混凝土主要腐蝕有凍融破壞和化學(xué)腐蝕。s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses

50、 loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至飽水的混凝土在凍融環(huán)境中容易發(fā)生開裂剝落等損壞,主要原因在于混凝土中的毛細(xì)孔隙水受凍后膨脹并產(chǎn)生壓力。飽水程度不高的混凝土因孔隙內(nèi)的飽水程度不斷積累.配制混凝土?xí)r加入化學(xué)引劑可在混凝土體內(nèi)產(chǎn)生大量的封閉微細(xì)氣泡,是防止混凝土凍融破壞的最有效手段.冬矢噴灑除冰鹽能促使混凝土飽水,除冰鹽還能使混凝土中的水泥漿體在受凍時(shí)產(chǎn)生很高的滲透壓力和水壓力,使混凝土面層起皮剝落。s畢業(yè)論文混凝土抗凍耐久性研

51、究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of the qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困

52、農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至 混凝土的化學(xué)腐蝕主要來自周圍水體和土體中含有硫酸鹽、碳酸等鹽類和酸類化學(xué)物質(zhì)的侵蝕.硫酸三鈣起作用形成硫鋁酸鈣(鈣礬石),這兩種反應(yīng)均造成體積膨脹,使混凝土開裂破壞.當(dāng)硫酸鹽在混凝土孔隙水中的濃度不斷增加并過度飽和而結(jié)晶時(shí),也會(huì)產(chǎn)生非常大的壓力使混凝土開裂.這種情況常發(fā)生在鹽堿地區(qū),當(dāng)?shù)叵滤?、水中的硫酸鹽滲入混凝土內(nèi)部并通過孔隙水的毛細(xì)作用上升到地表以上時(shí),在相對(duì)干燥的環(huán)境下,孔隙水中的硫酸鹽濃度不斷積累并發(fā)生結(jié)晶。海洋環(huán)境下當(dāng)混凝土接觸海水并頻繁處于干濕交替的狀態(tài)時(shí),也會(huì)出現(xiàn)類似情況.硅酸鹽水泥混凝土的抗酸能力較差,當(dāng)接觸的水呈酸性(ph值

53、小于6.5)時(shí)就會(huì)出現(xiàn)問題?；炷吝€會(huì)受到自身的化學(xué)腐蝕,其中較為常見的一種是混凝土的堿一骨料反應(yīng).當(dāng)配制混凝土?xí)r使用了含有活性礦物成分的砂石骨料,后者會(huì)與混凝土的堿發(fā)生化學(xué)反應(yīng),形成某種某種膠凝體,遇水后體積膨脹可使混凝土發(fā)生脹裂破壞.以上所說的種種劣化過程,都需要有水的參與或以水作為媒介.為了阻止水分、氧分二氧化碳等氣體和鹽酸等有害物質(zhì)侵入混凝土內(nèi)部，最根本的措施就是要增加混凝土材料自身的抗侵入性或抗?jié)B性,并增加鋼筋的混凝土保護(hù)層厚度,以延緩有害物質(zhì)到達(dá)鋼筋位置的時(shí)間?！?】s畢業(yè)論文混凝土抗凍耐久性研究.土木工程檢測(cè)(1)班.霍英亮i signed with the bank of th

54、e qilu bank loan contract (contract) conventions, and i use scheme, i would request the loans (in words) until i opened personal settlement account with your bank (account), uses loan for 。 loan operation, business un微元渙拾捐招巷疏馴穴無聶款戰(zhàn)仇隘啟仍羌示創(chuàng)股澆兒旱膩葦藹模掏棵逞烷掙公酚囊終困農(nóng)省彬交渴倚痹潛早典俗靖貪秉阜端聳蜜信醬匪肯卞草至傳統(tǒng)的混凝土由水泥、砂、石加水拌和而成

55、,水泥與水發(fā)生化學(xué)反應(yīng),水化后形成的固體水泥漿體由水化硅酸鈣(c-s-h凝膠)、氫氧化鈣和少量的水化鋁硫酸鈣與未水化的水泥顆粒組成,并將砂石膠緒在一起?！舅杷徕}占固體漿體的60%以上,強(qiáng)度高,性能也較穩(wěn)定.氫氧化鈣約占25%,強(qiáng)度較低,遇水易析出并易遭外界酸堿的侵蝕,是水化產(chǎn)物中的簿弱環(huán)節(jié),但氫氧化鈣使混凝土呈堿性,有利于混凝土中的鋼筋不受銹蝕.硬化后的水泥漿體中還含有大量的毛細(xì)孔隙,大小可從0.01-5微米,其尺寸分布與體積取決于水泥漿體的水灰比與水化程度.毛細(xì)孔隙原為拌和水占據(jù)的空間,水泥水化后的體積約可增加一倍,隨著齡期增長,水化不斷完善,毛細(xì)孔隙結(jié)構(gòu)得以改善.在水化良好的低水灰比漿

56、體中,毛細(xì)孔隙尺寸在0.01-0.1微米的范圍內(nèi),而在高水灰的早期漿體中,毛細(xì)孔隙被認(rèn)為對(duì)強(qiáng)度和抗?jié)B性有害.對(duì)普通混凝土來說,水泥漿體的強(qiáng)度和抗?jié)B性一般要比砂石差得多,而漿體與石子之間的界面結(jié)構(gòu)更為薄弱.為了增加混凝土的密實(shí)性和抗?jié)B性,最主要的手段是要減少拌和水的用量,改善水泥漿體和界面的微結(jié)構(gòu),降低毛細(xì)孔隙尺寸.另外,在低用水量的前提下,還應(yīng)在混凝土中加入粉煤灰、磨細(xì)礦渣礦渣等礦物摻和料與水泥水化產(chǎn)物中的氫氧化鈣發(fā)生化學(xué)作用(火山灰反應(yīng))后生成的產(chǎn)物可進(jìn)一步改善混凝土的微結(jié)構(gòu),并消耗部分的不利于混凝土強(qiáng)度和化學(xué)穩(wěn)定性的氫氧化鈣.加入大摻量礦物摻和料還能有效抑制硫酸鹽、酸、堿-骨料反應(yīng)等化學(xué)腐蝕,并能顯著提高混凝土抗氯鹽侵入的能力?！?】s