High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate

2021 ◽  
Vol 290 ◽  
pp. 123250
Author(s):  
Murat Dener ◽  
Mehmet Karatas ◽  
Mehrzad Mohabbi
Keyword(s):  
High Temperature ◽  
Portland Cement ◽  
Lightweight Aggregate ◽  
Cement Composite ◽  
Temperature Resistance ◽  
Alkali Activated Slag ◽  
High Temperature Resistance ◽  
Activated Slag ◽  
Alkali Activated

Strength and Resistance of Alkali-Activated Slag Concrete to High Temperature

2012 ◽  
Vol 193-194 ◽  
pp. 431-434 ◽  
Author(s):  
Mao Chieh Chi ◽  
Ran Huang ◽  
Wei Hsin Lu
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Relative Humidity ◽  
Superior Performance ◽  
Liquid Sodium ◽  
Temperature Resistance ◽  
Alkali Activated Slag ◽  
High Temperature Resistance ◽  
Activated Slag ◽  
Alkali Activated

This study presents an investigation into high-temperature resistance of alkali-activated slag concrete (AASC). Sodium oxide (Na2O) concentrations of 4%, 5% and 6% of slag weight and liquid sodium silicate (SiO2) with modulus ratio of 0.8 ( mass ratio of SiO2 to Na2O ) were used as activators to activate granulated blast furnace slag (GBFS). All cylindrical specimens with the same binder content and liquid/binder ratio of 0.5 were cast and cured in the air, under the saturated limewater and in a curing room at relative humidity of 80% RH and temperature of 60 °C, respectively. Test results demonstrate that the high-temperature resistance of AASC decreased with an increase of temperature. The compressive strength and high-temperature resistance of AASC improved with an increase dosage of Na2O and AASC cured at relative humidity of 80% RH and temperature of 60 °C has the superior performance, followed the AASC by air curing and saturated limewater curing. The higher compressive strength and superior high-temperature resistance have been obtained in AASC than comparable OPC.

A Review of Alkali-Activated Slag as Cement Replacement

2019 ◽  
Vol 803 ◽  
pp. 262-266
Author(s):  
Osama Ahmed Mohamed ◽  
Maadoum M. Mustafa
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Construction Industry ◽  
Ordinary Portland Cement ◽  
Environmental Footprint ◽  
Alkali Activated Slag ◽  
Cement Replacement ◽  
Activated Slag ◽  
Alkali Activated

Alkali activated slag (AAS) offers opportunities to the construction industry as an alternative to ordinary Portland cement (OPC). The production of OPC and its use contributes significantly to release of CO2 into the atmosphere while AAS is an industrial by-product that contributes much less to the environmental footprint that needs to be recycled if not landfilled. This paper outlines some of the key properties, merits and demerits of AAS when used as alternative to OPC. Competitive compressive strength of AAS concrete is amongst of the advantages of replacing cement with AAS while high shrinkage and carbonation levels are potential disadvantages.

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