Study on Properties of EPS Insulation Mortar

2015 ◽  
Vol 740 ◽  
pp. 15-18 ◽  
Author(s):  
Wei Zhou ◽  
Wen Hong Tao ◽  
Xing Hua Fu ◽  
Chuang Liu
Keyword(s):  
Fly Ash ◽  
Water Absorption ◽  
Thermal Insulation ◽  
Flue Gas ◽  
Cementitious Material ◽  
Dry Density ◽  
Cement Ratio ◽  
Fgd Gypsum ◽  
Slag Powder ◽  
Softening Coefficient

This paper deals with the aggregate-cement ratio and the influence of flue gas desulphurization(FGD) gypsum, fly ash and ground slag on the properties of EPS thermal insulation mortar. Results show that with the increase of aggregate-cement ratio, dry density and compressive strength of EPS thermal insulation mortar decreases, water absorption increases, softening coefficient decreases, meanwhile the performance of mortar becomes worse. When aggregate-cement ratio is 6% , the mortar shows the best performance. When aggregate-cement ratio reaches 7%, the mixture is loose in structure and difficult to shape. Fly ash and slag powder improves the performance of EPS thermal insulation mortar significantly, reduces the dry density, increases the comprehensive strength, water absorption and softening coefficient is improved. FGD gypsum makes insulation mortar strengthful, it plays excitation role for the activity in composite cementitious material admixture.

The Properties of Flue Gas Desulphurization (FGD) Gypsum

2011 ◽  
Vol 105-107 ◽  
pp. 2204-2208 ◽  
Author(s):  
Run Xia Hao ◽  
Xiao Yan Guo
Keyword(s):  
Mechanical Properties ◽  
Flue Gas ◽  
Steel Slag ◽  
Optical Microscope ◽  
Cementitious Material ◽  
Fgd Gypsum ◽  
Technical Performance ◽  
Slag Powder ◽  
Steel Slag Powder ◽  
Flue Gas Desulphurization

The properties of flue gas desulphurization (FGD) gypsum were analysized by Thermo-gravimetry/differential scanning calorimetry (TG/DSC), technical performance analysis, optical microscope and Scanning electron microscope (SEM). Mechanical properties of FGD gypsum-steel slag powder cementitious material were researched. The results revealed that FGD gypsum have similar moisture content, major component CaSO4·2H2O with natural gypsum, and has better technical performance than natural gypsum. The results of optical microscope and SEM of the FGD gypsum hydration support this further. When the dosage of steel slag powder is 15%, containing activator ,better mechanical properties can be obtained. Key words: FGD gypsum, Property, Cementitious material

Study on Waste Foam Glass Insulation Board

2014 ◽  
Vol 621 ◽  
pp. 61-64
Author(s):  
Li Li Xue ◽  
Zhi Rong Niu
Keyword(s):  
Thermal Conductivity ◽  
Fly Ash ◽  
Water Absorption ◽  
Foam Glass ◽  
Raw Material ◽  
Dry Density ◽  
Fgd Gypsum ◽  
Glass Insulation ◽  
And Performance

Introduces a kind of self-insulation board made of waste foam glass, fly ash, and FGD gypsum as main raw material. And researches on the preparation and performance of the insulation board, such as strength, thermal conductivity and water absorption per volume.The test shows that the thermal conductivity is between 0.07-0.13 w/(m·k), strength can reach more than 0.5Mpa,the minimum dry density is 400kg/m3.

Effect of Water Reducer and Cellulose Ether on Sulphoaluminate Cement-Based Lightweight Thermal Insulation Board

2014 ◽  
Vol 541-542 ◽  
pp. 273-276
Author(s):  
Xiao Nan Dong ◽  
Xi Chen ◽  
Ling Chao Lu ◽  
Shuai Yang
Keyword(s):  
Mechanical Strength ◽  
Thermal Insulation ◽  
Influential Factor ◽  
Cellulose Ether ◽  
Dry Density ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Sulphoaluminate Cement ◽  
Effect Of Water ◽  
Good Workability

The effects of two admixtures content i.e. water reducer, cellulose ether and water-cement ratio on mechanical strength and dry density of cement-based lightweight thermal insulation board are studied. The result indicates that the water-cement ratio is the important influential factor, which is easier to get good workability. And based on the mechanical strength and dry density, the best range of water reducer content and cellulose ether content are 0.3%-0.6% and 0.4%-0.6% respectively.

Research on the Foamed Concrete with High Volume Fly Ash

2017 ◽  
Vol 727 ◽  
pp. 1062-1066
Author(s):  
Hui Chao Chu ◽  
Xian Jun Lyu ◽  
Yan Zhang
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Fly Ash ◽  
Water Absorption ◽  
Process Parameters ◽  
High Volume ◽  
Dry Density ◽  
High Volume Fly Ash ◽  
Foamed Concrete

A study has been undertaken to investigate the effects, on the properties of foamed concrete, of replacing large volumes of cement with fly ash. This paper reports the results of the properties of foamed concrete and shows that up to 55% of the cement could be replaced without any significant reduction in compressive strength. Foamed concrete with 55% fly ash and good performance were obtained by optimizing the process parameters. The results showed that the compressive strength, dry density, water absorption and thermal conductivity of foamed concrete with 55% fly ash were 0.71MPa, 244kg/m3, 33%, and 0.045 W/mK respectively.

Study on Flue Gas Desulphurization Gypsum Plaster

2011 ◽  
Vol 71-78 ◽  
pp. 842-846
Author(s):  
Miao Miao Chen ◽  
Yun Wei Yu ◽  
Chun Hua Feng ◽  
Dong Xu Li
Keyword(s):  
Fly Ash ◽  
Flue Gas ◽  
Water Retention ◽  
Setting Time ◽  
Strength Loss ◽  
Optimum Level ◽  
Fgd Gypsum ◽  
Gypsum Plaster ◽  
Calcined Gypsum ◽  
Flue Gas Desulphurization

Flue gas desulphurization (FGD) gypsum and fly ash are two kinds of solid waste in coal-fired power plant. The possible displacement content of fly ash in gypsum plaster was investigated in this paper. The effect of various chemicals retarders, such as Citric acid, sodium citrate and SC gypsum retarder, and water retention agent on the setting time, flexural strength and compressive strength of gypsum plaster was also studied. The results demonstrate that gypsum plaster has maximum mechanical properties and enough setting time at the rate of 20% fly ash replacing calcined gypsum; SC gypsum retarder effectively delays the setting time and has lower strength loss; The optimum level of water-retention agent for effective utilization of gypsum plaster is 0.2%.

Study on Preparation and Properties of Composite Insulation Mortar

2014 ◽  
Vol 538 ◽  
pp. 7-10
Author(s):  
Yu Peng Chen ◽  
Xing Hua Fu ◽  
Wen Hong Tao ◽  
Li Yuan Dong ◽  
Hai Tao Yu
Keyword(s):  
Electron Microscopy ◽  
Compressive Strength ◽  
Fly Ash ◽  
Weight Ratio ◽  
Dry Density ◽  
Function Mechanism ◽  
Testing Method ◽  
Hydrophobic Agent ◽  
Softening Coefficient ◽  
Scanning Electron

Orthogonal testing method was used to study the effects of fly ash, aggregate, weight ratio of water and material, way of incorporation of hydrophobic agent, on dry density, compressive strength, water absorption and softening coefficient of composite insulation mortar. The optimal ratio was obtained as 15% of the total weight is fly ash, 40% of the weight are aggregate, weight ratio of water and material are 1.1, 0.2% is hydrophobic agent (hydrophobic agent was added in the mixture). The main performances of the mortar were recorded as dry density was 220Kg/m3, compressive strength after 28 days was 0.50MPa, and thermal conductivity 0.0593W/(m•K). Microstructure of the composite insulation mortar was analyzed by SEM (scanning electron microscopy) and its function mechanism was studied preliminarily.

Orthogonal Test of Characteristics of Complex Cememting Material of FGD Gypsum-Fly Ash

2011 ◽  
Vol 250-253 ◽  
pp. 460-463
Author(s):  
Yi Zhang ◽  
Xin Tang Wang ◽  
Ming Zhou ◽  
Wan Zhen Wang
Keyword(s):  
Fly Ash ◽  
Orthogonal Test ◽  
Test Method ◽  
Experimental Results ◽  
Mineral Admixtures ◽  
Fgd Gypsum ◽  
Slag Powder ◽  
Mix Proportion ◽  
Orthogonal Test Method ◽  
Cementing Material

Orthogonal test method is used to study the effect of the mineral admixtures on the performance of FGD gypsum-fly ash complex cementing material. On the basic experiment, the effect of the traditional alkali and salt admixtures added to the complex cementitious system is discussed, the factors effecting on performance of the FGD gypsum were analyzed. Based on the experimental results, the best mix proportion was determined. Finally, the basic performance of complex cementitious material was tested. The experimental results show that the performance of FGD gypsum which is activated through adding the compound admixtures was similar with the ordinary interior wall materials. The strength and water resistance of FGD gypsum complex cementing material can be greatly enhanced by adding cement, quicklime and slag powder, and effect of cement is largest, and slag smallest. The performance of the gypsum complex cementing material also can be improved after incorporation of a few of chemical admixture on the basis of adding mineral activators.

Study on Preparation and Properties of Cement-Based Foamed Lightweight Thermal Insulation Material

2011 ◽  
Vol 306-307 ◽  
pp. 994-997
Author(s):  
Cong Cong Jiang ◽  
Guo Zhong Li ◽  
Shui Zhang
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Fly Ash ◽  
Thermal Insulation ◽  
Thermal Conductivity Coefficient ◽  
Steel Slag ◽  
Activation Mechanism ◽  
Dry Density ◽  
Insulation Material ◽  
Thermal Insulation Material

A cement-based foamed lightweight thermal insulation material was prepared with cement, industrial waste (fly ash, steel slag) as the main raw materials, by using self-developed composite activator and foaming agent. The influence of foam content on dry density, compressive strength and thermal conductivity coefficient of material was studied, the activation mechanism of composite activator to fly ash and steel slag was discussed. Results showed that, the dry density and compressive strength of material decreased, and thermal conductivity coefficient decreased first and then increased with the increasing foam content.

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