Mechanical strength and durability performance of autoclaved lime-saline soil brick

2017 ◽  
Vol 146 ◽  
pp. 403-409 ◽  
Author(s):  
Tung-Chai Ling ◽  
Kim Hung Mo ◽  
Lie Qu ◽  
Jiujun Yang ◽  
Lei Guo
Keyword(s):  
Mechanical Strength ◽  
Saline Soil ◽  
Strength And Durability ◽  
Durability Performance

scholarly journals Effect of High-Dispersible Graphene on the Strength and Durability of Cement Mortars

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 915
Author(s):  
Xiaoqiang Qi ◽  
Sulei Zhang ◽  
Tengteng Wang ◽  
Siyao Guo ◽  
Rui Ren
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Cement Mortar ◽  
Chloride Ion ◽  
Cementitious Materials ◽  
Chloride Ion Penetration ◽  
Cement Mortars ◽  
Strength And Durability ◽  
Durability Performance

Graphene’s outstanding properties make it a potential material for reinforced cementitious composites. However, its shortcomings, such as easy agglomeration and poor dispersion, severely restrict its application in cementitious materials. In this paper, a highly dispersible graphene (TiO2-RGO) with better dispersibility compared with graphene oxide (GO) is obtained through improvement of the graphene preparation method. In this study, both GO and TiO2-RGO can improve the pore size distribution of cement mortars. According to the results of the mercury intrusion porosity (MIP) test, the porosity of cement mortar mixed with GO and TiO2-RGO was reduced by 26% and 40%, respectively, relative to ordinary cement mortar specimens. However, the TiO2-RGO cement mortars showed better pore size distribution and porosity than GO cement mortars. Comparative tests on the strength and durability of ordinary cement mortars, GO cement mortars, and TiO2-RGO cement mortars were conducted, and it was found that with the same amount of TiO2-RGO and GO, the TiO2-RGO cement mortars have nearly twice the strength of GO cement mortars. In addition, it has far higher durability, such as impermeability and chloride ion penetration resistance, than GO cement mortars. These results indicate that TiO2-RGO prepared by titanium dioxide (TiO2) intercalation can better improve the strength and durability performance of cement mortars compared to GO.

scholarly journals Cement-Based Materials Containing Graphene Oxide and Polyvinyl Alcohol Fiber: Mechanical Properties, Durability, and Microstructure

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 638 ◽  
Author(s):  
Wenguang Jiang ◽  
Xiangguo Li ◽  
Yang Lv ◽  
Mingkai Zhou ◽  
Zhuolin Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Flexural Strength ◽  
Polyvinyl Alcohol ◽  
Mechanical Strength ◽  
Mechanical Performance ◽  
Control Sample ◽  
Corrosion Condition ◽  
Cement Based Materials ◽  
Strength And Durability ◽  
Pva Fiber

The influence of graphene oxide (GO) and polyvinyl alcohol (PVA) fiber on the mechanical performance, durability, and microstructure of cement-based materials was investigated in this study. The results revealed that compared with a control sample, the mechanical strength and durability of cement-based materials were significantly improved by adding PVA fiber and GO. The compressive and flexural strength at 28 d were increased by 30.2% and 39.3%, respectively. The chloride migration coefficient at 28 d was reduced from 7.3 × 10−12 m2/s to 4.3 × 10−12 m2/s. Under a sulfate corrosion condition for 135 d, the compressive and flexural strength still showed a 13.9% and 12.3% gain, respectively. Furthermore, from the Mercury Intrusion Porosimetry (MIP) test, with the incorporation of GO, the cumulative porosity decreased from more than 0.13 cm3/g to about 0.03 cm3/g, and the proportion of large capillary pores reduced from around 80% to 30% and that of medium capillary pores increased from approximately 20% to 50%. Scanning electron microscope (SEM) images showed a significant amount of hydration products adhering to the surface of PVA fiber in the GO and PVA fiber modified sample. The addition of GO coupling with PVA fiber in cement-based materials could promote hydration of cement, refine the microstructure, and significantly improve mechanical strength and durability.

Technology for Utilization of Polymer Components of Municipal and Industrial Waste to Obtain Building Structures

2021 ◽  
Vol 25 (2) ◽  
pp. 4-7
Author(s):  
V.S. Ezhov ◽  
N.E. Semicheva ◽  
E.G. Pakhomovа ◽  
T.V. Polivanovа
Keyword(s):  
Mechanical Strength ◽  
Industrial Waste ◽  
Hot Water ◽  
Innovative Technology ◽  
Building Structures ◽  
Structural Elements ◽  
Fuel Gas ◽  
Polymer Component ◽  
Hot Water Supply ◽  
Strength And Durability

A brief substantiation of the proposed innovative technology for the utilization of polymer components of municipal and industrial waste with the receipt of elements of building structures is presented. Along with the utilization of polymers, the proposed technology provides for own utilization needs in fuel gas, as well as for the production of building structural elements and hot water for heating and hot water supply. The process of obtaining structural elements is accompanied by crystallization of their polymer component, which increases their mechanical strength and durability.

Curing of slag concretes at low temperatures: effect on selected durability properties

MRS Advances ◽  
2020 ◽  
Vol 5 (25) ◽  
pp. 1267-1275
Author(s):  
Mike Otieno ◽  
Riccardo Opeka
Keyword(s):  
Oxygen Permeability ◽  
Gas Permeability ◽  
Curing Temperature ◽  
Durability Properties ◽  
Chloride Resistance ◽  
Blastfurnace Slag ◽  
Water Sorptivity ◽  
Chloride Conductivity ◽  
Strength And Durability ◽  
Durability Performance

AbstractThe influence of low curing temperatures (5, 10 and 15 ± 2 °C) on the strength and durability properties of ground granulated blastfurnace slag (GGBS) and ground granulated Corex slag (GGCS) concretes was studied. A standard curing temperature of 23 ± 2 °C) was also used for comparative purposes. Test specimens were cast using 100% CEM I 52.5N (PC), and three PC/Slag (GGBS or GGCS) replacement ratios of 50/50, 65/35 and 80/20, and a w/b ratio of 0.40. The specimens were cured for 28 days by submersion in water at the respective curing temperatures and then tested for durability. Durability was assessed using oxygen permeability, water sorptivity and chloride conductivity tests. The results showed that durability of the concretes decreased as the curing temperature decreased – gas permeability and water sorptivity increased while chloride resistance decreased. It was also observed that at a given curing temperature, the slag blended concretes showed superior durability performance than the plain PC concretes.

scholarly journals Metamodel-based optimization of a control arm considering strength and durability performance

2010 ◽  
Vol 60 (4) ◽  
pp. 976-980 ◽  
Author(s):  
Xue Guan Song ◽  
Ji Hoon Jung ◽  
Hwan Jung Son ◽  
Joon Hong Park ◽  
Kwon Hee Lee ◽  
...  
Keyword(s):  
Strength And Durability ◽  
Durability Performance

Strength and durability performance of HPC incorporating pozzolans at elevated temperatures

2002 ◽  
Vol 20 (4) ◽  
pp. 123-128 ◽  
Author(s):  
R.V. Balendran ◽  
T.M. Rana ◽  
T. Maqsood ◽  
W.C. Tang
Keyword(s):  
Elevated Temperatures ◽  
Strength And Durability ◽  
Durability Performance
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