混凝土外加劑原理及應用技術(shù)

1、會計學1混凝土外加劑原理及應用技術(shù)混凝土外加劑原理及應用技術(shù)第1頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第2頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第3頁/共98頁Key Laboratory of Advanced Civil Engineering Materials

2、(Tongji University), Ministry of Education第4頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第5頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第6頁/共98頁Key Laboratory of Advanc

3、ed Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第7頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第8頁/共98頁 幾種類型減水劑的特性減水劑減水劑摻量摻量/%界面張力界面張力/mN.m-1減水率減水率/%純水純水/70.2/高濃型高濃型FDN萘系減水萘系減水劑劑0.506

4、8.518聚羧酸系聚羧酸系減水劑減水劑0.2043.026氨基磺酸鹽系減水劑氨基磺酸鹽系減水劑0.5052.022Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第9頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第10頁/共98頁 摻加減水劑的漿體中絮凝狀結(jié)構(gòu)的

5、解體游離水游離水水泥顆粒水泥漿體絮凝狀結(jié)構(gòu)的形成Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第11頁/共98頁凝凝 聚聚凝凝 聚聚分分 散散分分 散散第12頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第13頁/共98頁K

6、ey Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education一、外加劑作用原理一、外加劑作用原理第14頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education二、外加劑基本性能二、外加劑基本性能第15頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(

7、Tongji University), Ministry of Education二、外加劑基本性能二、外加劑基本性能第16頁/共98頁普通減水劑高效減水劑高性能減水劑Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education二、外加劑基本性能二、外加劑基本性能第17頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Educat

8、ion二、外加劑基本性能二、外加劑基本性能第18頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education二、外加劑基本性能二、外加劑基本性能第19頁/共98頁木鈣減水劑摻量對混凝土坍落度的影響0246810121416182000.10.20.30.40.51木鈣摻量( % C )坍落度( c m )二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(To

9、ngji University), Ministry of Education第20頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第21頁/共98頁 木鈣摻量對混凝土含氣量的影響0123456700.10.20.30.40.50.60.70.8木鈣摻量( % C )含氣量( % )第22頁/共98頁MDF、M F高 效減水劑摻量與混凝土含氣量的關(guān)系012345600.250.50.751摻量( % C)

10、含氣量( % )FDN(機械振搗)FDN(人工搗實)MF第23頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第24頁/共98頁木鈣摻量對礦渣大壩水泥所配制混凝土的凝結(jié)時間的影響( 同水泥用量, 同坍落 度 )010203040506000.20.30.40.5摻量( % C)凝結(jié)時間( 小時)初凝終凝二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil E

11、ngineering Materials(Tongji University), Ministry of Education第25頁/共98頁萘系高效減水劑對混凝土凝結(jié)時間的影響 (同水泥用量，同坍落度)凝結(jié)時間(h:min)減水劑名稱及摻量(%C)水灰比坍落度(cm)初凝終凝00.438-128-911-12FDN高效減水劑0.50.368-129-1012-1300.6123.85:559:200.50.5935.06:309:15UNF高效減水劑1.00.5764.55:558:4000.708.56:158:30SN-II高效減水劑1.00.549.06:308:30二、外加劑基本性能

12、二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第26頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第27頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering

13、Materials(Tongji University), Ministry of Education第28頁/共98頁第29頁/共98頁木鈣減水劑摻量對混凝土抗壓強度的影響0102030405000.10.20.30.40.50.60.70.8木鈣摻量( % C )抗壓強度( M P a )1d3d7d28d90d第30頁/共98頁FDN高效減水劑摻量與混凝土抗壓強度的關(guān)系2025303540455000.250.50.751FDN摻量( % C)抗壓強度( M P a )第31頁/共98頁摻加減水劑對混凝土抗?jié)B性的影響混凝土配合比C:S:G減水劑品種及摻量(%C)W/C坍落度(cm)抗?jié)B等

14、級1:1.92:4.081:1.93:4.10/木鈣 0.250.610.482.02.0S10S201:1.48:3.401:1.48:3.40/MF 0.50.500.4089.012.0S10S301:1.68:3.701:1.71:3.88/UNF-2 0.50.5640.5072.03.5S6S20二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第32頁/共98頁第33頁/共98頁第34頁/共98頁第35頁

15、/共98頁第36頁/共98頁 羥基 28 天抗壓強度比,%一等品310875合格品510770備注凈漿 W/C=0.40,砂漿 C:S=1:1.5, W/C=0.50第42頁/共98頁第43頁/共98頁第44頁/共98頁 0d 1d 3d 7d 28d齡期抗壓強度摻與不摻速凝劑對混凝土強度的影響摻速凝劑基準混凝土第45頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第46頁/共98頁二、外加劑基本性能二、

16、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第47頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第48頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Ma

17、terials(Tongji University), Ministry of Education第49頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第50頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第51頁/

18、共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第52頁/共98頁0 1 2 3 4 5 6 7 8 90 20 40 60 80 100 120耐久性指數(shù)DF(%)含氣量(%)非引氣混凝土引氣混凝土0.30W/C0.60DF(%)=P*N/300 *100%混凝土抗凍性與含氣量的關(guān)系第53頁/共98頁二、外加劑基本性能二、外加劑基本性能Key Laboratory of Advanced Civil Eng

19、ineering Materials(Tongji University), Ministry of Education第54頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第55頁/共98頁第56頁/共98頁第57頁/共98頁第58頁/共98頁第59頁/共98頁 攪拌 水泥(和摻合料) + 減水劑干粉 + 集料 混凝土拌合物 水第60頁/共98頁第61頁/共98頁第62頁/共98頁第63頁/共98頁第64頁/共98頁第65頁/共98頁 攪

20、拌 攪拌水泥(和摻合料) + 集料 拌合物 運輸 混凝土拌合物 水 部分減水劑第66頁/共98頁經(jīng)過時間經(jīng)過時間(min)00.3%6030坍落度坍落度(cm)0.3%0.3%0.9%第67頁/共98頁第68頁/共98頁第69頁/共98頁第70頁/共98頁第71頁/共98頁第72頁/共98頁第73頁/共98頁第74頁/共98頁Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第75頁/共98頁Key Laboratory of Advanced Civi

21、l Engineering Materials(Tongji University), Ministry of Education第76頁/共98頁五、混凝土坍落度損失機理及控制技術(shù)五、混凝土坍落度損失機理及控制技術(shù)Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第77頁/共98頁水化產(chǎn)物第78頁/共98頁水化產(chǎn)物第79頁/共98頁五、混凝土坍落度損失機理及控制技術(shù)五、混凝土坍落度損失機理及控制技術(shù)Key Laboratory of Advanced

22、Civil Engineering Materials(Tongji University), Ministry of Education第80頁/共98頁第81頁/共98頁第82頁/共98頁六、混凝土外加劑與水泥六、混凝土外加劑與水泥/摻合料適應性摻合料適應性Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education第83頁/共98頁水泥廠水泥廠外加劑廠外加劑廠施工單位施工單位混凝土供應混凝土供應商商第84頁/共98頁混凝土外加劑與水泥適應性的概念混凝土外加劑

23、與水泥適應性的概念 按照混凝土外加劑應用技術(shù)規(guī)范，將經(jīng)檢驗符合按照混凝土外加劑應用技術(shù)規(guī)范，將經(jīng)檢驗符合有關(guān)標準的某種外加劑摻加到用按規(guī)定可以使用該有關(guān)標準的某種外加劑摻加到用按規(guī)定可以使用該品種外加劑的水泥所配制的混凝土中，一般產(chǎn)生兩品種外加劑的水泥所配制的混凝土中，一般產(chǎn)生兩種情況：種情況： 1 1）能夠產(chǎn)生應有的效果，就認為該水泥與這種）能夠產(chǎn)生應有的效果，就認為該水泥與這種外加劑是適應的；外加劑是適應的； 2 2）如果不能產(chǎn)生應有的效果，則該水泥與這種）如果不能產(chǎn)生應有的效果，則該水泥與這種外加劑之間存在不適應性。外加劑之間存在不適應性。第85頁/共98頁第86頁/共98頁第87頁/共98頁混凝土外加劑技術(shù)趨向混凝土外加劑技術(shù)趨向 從2008年6月1日起，GB175-2007 通用硅酸鹽水泥正式實施水泥企業(yè)間的兼并和重組將可能使得不同生產(chǎn)廠的水泥以同一品牌面市 修訂的GB8076 混凝土外加劑標準中泵送劑的指標要求可能會拒普通型泵送劑于門外，建議采用“普通減水劑(緩凝型、標準型)