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稳定土 Ⅱ :二灰稳定土. 1 粉煤灰是什么?它是怎样产生的?为什么烧失量是指示粉煤灰质量的重要指标?为什么硅铝化( SiO2/Al2O3 )是指示粉煤灰活性的指标? 2 为什么说粉煤灰的细度对其活性影响很大?道路上为什么用石灰与粉煤灰作为胶结料稳定土? 3 二灰稳定产物有什么特点?工程上如何考虑配比设计? 4 二灰土的施工工艺如何?. 1 粉煤灰的产生与特性 —— 粉煤灰主要是煤粉颗粒中不可燃的粘土矿物杂质转变而来。 —— 这些矿物杂质主要是: 铝硅酸盐类的粘土质矿物(粘土岩,页岩,长石等),氧化硅(石英)。 - PowerPoint PPT Presentation
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1 SiO2/Al2O32 3 4
1 3006501100 RCO3RSO3RSO3SO2SO3RCO3CO2
160014501500,1000-110010-15%85-90%
1.11.11SiO2+Al2O3+Fe2O3>70%CaOCaO26%CaO1040%SiO2+Al2O3+Fe2O3>70% SiO2+Al2O3+Fe2O3>50%
1
SiO2Al2O3Fe2O3CaOMgO%34~6017~352~150.8~40.7~21.2~24%50.627.27.02.81.28.2
,SO3Na2OK2O
1.22,,60%
2
%50.2~79.00.9~18.52.7~34.10~4.70.4~13.8%60.48.121.21.12.8
1.3
.
0.0450.080mm0.04mm40%0.07570%2500 cm2 / g
.
1.4[SiO4]4-CaOSiO2CaO[SiO4]4-[SiO4]4-
[SiO4]4-34AlFeBSi6NaKCaMgSiSiOSi
=[/-1]*100% */ 10.5
1329580.5%0.5%NaCO3NaOHNaCO3NaOHMPa7d0.91/ *1.02/ *28d2.06/1.07*2.04/1.07*9387 90d3.88/2.34*3.38/2.34*66 63
22.170%423%43%
4
g/cm3g/cm31.401.450.901.051.952.151.101.201.902.051.601.852.702.760.500.701.902.001.601.802.652.690.600.70
W=44%K=89%120-130cm 1-510-4cm/sec3
35-40%
0.002-0.005mm--T21448%
2.2()
80090010JTJ-200020%
SiO2Al2O3Fe2O3PAI5JTJ-200070SiO2/Al2O3
5
MPa 7d14d28d2391250.279.487.10.240.760.920.351.001.490.441.601.930.942.033.351.312.304.922.674.188.323.564.539.23
45m67
6
g/m3MPa7d14d28d36101210:40:5010:40:5025.631.11.251.260.460.600.610.860.851.161.191.591.662.444.274.975.206.13
7
mm1.181002500cm2/g90%0.3 mm70%0.075 mm0.15750.07545
3 H+K+Na+
Ca2+,
SiO2+XCa(OH)2+(nx)H2O=XCaoSiO2nH2OAl2O3+XCa(OH)2+(nx)H2O=XCaoAl2O3nH2O
XCaOSiO2nH2OXCaOAl2O3nH2O
CaMgPHpozzuolana
1329580.5%0.5%NaCO3NaOHNaCO3NaOHMPa7d0.91/1.02/28d2.06/1.07*2.04/1.07*938790d3.88/2.34*3.38/2.34*6663
Ca(OH)2MO4M2O8MSiAlCa(OH)2Si-OAl-OCa(OH)2C-S-HC-A-H
Ca(OH)2C-S-HC-A-HCa(OH)2
PHPH.pH
7d7d714d
1428d2860d
7
4.3
713180
32%36%36%36%40%
121314 4.4
5
6 8696969
T14T257142171421124%1460.410.671.120.530.821.0760.710.891.350.550.751.05224%1260.580.861.130.600.881.1360.750.991.430.570.851.21332%1490.480.980.821.2490.530.750.971.001.371.44
895%98%25%
92005.45 102005.6.36.16
112005.6.36.16
200535222005.6.36.1616911
12
14
15
1241012713145126101mm15
16
17
18
196
ABC12+1+13+1+24+1+2+1+2207
++20C490.490.8A285.791.3CCAB
ABC95%95%98%