Design, dynamic performance and ecological efficiency of fiber-reinforced mortars with different binder systems: Ordinary Portland cement, limestone calcined clay cement and alkali-activated slag

2022 ◽  
pp. 130478
Author(s):  
Wu-Jian Long ◽  
Zhuorui Wu ◽  
Kamal H. Khayat ◽  
Jingjie Wei ◽  
Biqin Dong ◽  
...  
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Dynamic Performance ◽  
Fiber Reinforced ◽  
Ecological Efficiency ◽  
Calcined Clay ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

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.

scholarly journals Effect of Mixture Variables on Durability for Alkali-Activated Slag Cementitious

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2252 ◽  
Author(s):  
Chi-Che Hung ◽  
Yuan-Chieh Wu ◽  
Wei-Ting Lin ◽  
Jiang-Jhy Chang ◽  
Wei-Chung Yeih
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Chloride Permeability ◽  
Alkali Activated Slag ◽  
Binder Ratio ◽  
Activated Slag ◽  
Alkali Activated ◽  
Ordinary Portland Cement Concrete

In this study, the influence of three mixture variables named Sand/Aggregate ratio, Liquid/Binder ratio, and Paste/Aggregate ratio on the cementitious properties were studied. The durability of cementitious including absorption, absorption rate, resistivity, rapid chloride permeability index, and carbonation rate were examined. Results showed that the alkali-activated slag cementitious has superior durability. The trends of influences on the composites properties for these three mixture variables are similar to those for the ordinary Portland cement concrete. It means that the experiences for making the ordinary Portland cement concrete should be able to be used for the alkali-activated slag cementitious. This paper also provides a lot of data for the alkali-activated slag cementitious for future development of the mix design.

Hydration of alkali-activated slag: comparison with ordinary Portland cement

2006 ◽  
Vol 18 (3) ◽  
pp. 119-128 ◽  
Author(s):  
A. Gruskovnjak ◽  
B. Lothenbach ◽  
L. Holzer ◽  
R. Figi ◽  
F. Winnefeld
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Alkali Activated

scholarly journals Effects of Light-Burnt Dolomite Incorporation on the Setting, Strength, and Drying Shrinkage of One-Part Alkali-Activated Slag Cement

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2874 ◽  
Author(s):  
In Kyu Jeon ◽  
Jae Suk Ryou ◽  
Sadam Hussain Jakhrani ◽  
Hong Gi Kim
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Setting Time ◽  
Drying Shrinkage ◽  
Slag System ◽  
Strength Development ◽  
Alkali Activated Slag ◽  
Granulated Blast Furnace Slag ◽  
Activated Slag ◽  
Alkali Activated

This study investigates the potential of light-burnt dolomite (LBD) as a supplementary cementitious material with ground granulated blast furnace slag (GGBFS) and Ordinary Portland cement (OPC). In this work, LBD was substituted for up to 20% of GGBFS in sodium sulfate-activated slag systems. The effects of LBD incorporation on the flow, setting time, compressive and flexural strength development, and drying shrinkage were explored with, X-ray diffraction and thermogravimetric analyses. LBD incorporation resulted in greater strength development of an alkali-activated slag system. The optimum LBD content for strength development was 10%, regardless of ordinary Portland cement content. In addition, LBD decreased the drying shrinkage, accelerated the hydration process, and induced hydrotalcite formation, which can be attributed to the reactive MgO inside LBD.

scholarly journals Impacts of Casting Scales and Harsh Conditions on the Thermal, Acoustic, and Mechanical Properties of Indoor Acoustic Panels Made with Fiber-Reinforced Alkali-Activated Slag Foam Concretes

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 825 ◽  
Author(s):  
Mastali Mohammad ◽  
Kinnunen Paivo ◽  
Karhu Marjaana ◽  
Abdollahnejad Zahra ◽  
Korat Lidija ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Sound Absorption ◽  
Acoustic Properties ◽  
Recycled Aggregates ◽  
Fiber Reinforced ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Harsh Conditions ◽  
Alkali Activated

This paper presents experimental results regarding the efficiency of using acoustic panels made with fiber-reinforced alkali-activated slag foam concrete containing lightweight recycled aggregates produced by using Petrit-T (tunnel kiln slag). In the first stage, 72 acoustic panels with dimension 500 × 500 × 35 mm were cast and prepared. The mechanical properties of the panels were then assessed in terms of their compressive and flexural strengths. Moreover, the durability properties of acoustic panels were studied using harsh conditions (freeze/thaw and carbonation tests). The efficiency of the lightweight panels was also assessed in terms of thermal properties. In the second stage, 50 acoustic panels were used to cover the floor area in a reverberation room. The acoustic absorption in diffuse field conditions was measured, and the interrupted random noise source method was used to record the sound pressure decay rate over time. Moreover, the acoustic properties of the panels were separately assessed by impedance tubes and airflow resistivity measurements. The recorded results from these two sound absorption evaluations were compared. Additionally, a comparative study was presented on the results of impedance tube measurements to compare the influence of casting volumes (large and small scales) on the sound absorption of the acoustic panels. In the last stage, a comparative study was implemented to clarify the effects of harsh conditions on the sound absorption of the acoustic panels. The results showed that casting scale had great impacts on the mechanical and physical properties. Additionally, it was revealed that harsh conditions improved the sound properties of acoustic panels due to their effects on the porous structure of materials.

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