strength and durability properties of alkali activated slag
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Hydration and properties of sodium sulfate activated slag
Interest in alkaliactivated slag as a construction material is increasing, primarily due to its environmentally friendly nature. Although strong alkaline activators, such as sodium hydroxide and sodium silicate solution, are preferred for high strength, none of them exists naturally and their manufacturing process is quite energy intensive.
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Physicochemical, mechanical, microstructure and ...
Alkali activator contents affected the location and intensities of the conductivity maximum. Mix S5 shows the higher values of compressive strength at all curing ages up to 90 days. Mix S1 shows higher values of strength in 5% MgSO 4 or MgCl 2 solution upto 180 days. Alkali activated GBFS improves the durability and the resistance to chemical attack.
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AlkaliActivated Blast furnace Slag as a Green ...
Alkaliactivated slag (AAS). An attempt has been made to manufacture AlkaliActivated Slag composites which can be considered as a Green construction material. The paper presents the effect of curing conditions on engineering properties such as Water absorption, Apparent porosity and Compressive strength of AAS pastes.
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Preparation and Properties of AlkaliActivated Ground ...
Thermal storage concrete is prepared by using alkaliactivated groundgranulated blast furnace slag as cementitious material. To improve thermal conductivity, graphite aggregate is used to replace part of the coarse aggregate, and, furthermore, polypropylene fiber is added to improve the heat resistance performance of the concrete. The compressive strength of concrete specimens before and ...
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Alkali activated slag concretes designed for a desired ...
This article outlines the findings of investigation of alkali activated slag concretes (AASC), to provide a comprehensive view of the effect of mix design variables on slump, strength, and chloride transport and binding. It is concluded that AASC can be designed for different workability and different grades of .
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Effect of Red Mud Content on Strength and Efflorescence in ...
Efflorescence which severely occurs in alkaliactivated slag cement can cause reduction of strength and durability due to calcium leaching.
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Properties of hybrid steel fiber reinforced alkali ...
Alkali activated materials have attracted great attention in recent years due to their excellent mechanical properties, durability, thermal stability; as well as the much lower carbon emission and energy costs compared to Portland cement.
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ALKALI ACTIVATED MATERIALS: REVIEW OF CURRENT .
slag as aluminosilicate precursors, and activated with sodium silicate [14, 15]. Formation of gel that is rich in silica has been attributed to the high shrinkage in slag activated with sodium silicate [16, 17]. As the rich silica gel loses moisture during drying, it causes microcracks within the AAS paste.
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Durability of alkaliactivated fly ash and slag concrete ...
Prior to durability test, the compressive strength of investigated mixtures was determined at early ages (1, 7 days) and after 28, 56, 90 days curing. The slagrich mixtures have shown high compressive strength values (~45MPa after 1 day and ~80MPa after 28 days curing).
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SOME DURABILITY PROPERTIES OF ALKALI ACTIVATED .
Some durability properties of alkali activated materials (AAM) produced with ceramic powder and micro calcite Ceramics – Silikáty 62 (4) 342354 (2018) 343 against a sulfate attack. Sulfate resistance of geopolymer concretes depend not only on the sulfate concentration and the type of cations, but also on the gel compositions [10, 16, 2427].
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EXPERIMENTAL INVESTIGATION OF MICROREINFORCED, .
properties were compared to potassiumbased alkaliactivated slag without wollastonite. Based on a 28 day compressive strength curve, it was determined that the optimal loading of wollastonite in slag generated an average compressive strength of MPa, an increase in strength of 60% from the wollastonitefree sample.
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Research Article Strength and Durability Performance of ...
slag(GGBFS),andricehushask(RHA),whichcontributesto the improvement of the binder properties such as longterm strength, permeability, and durability [ ]. e continuous increase in the generation of waste materials outlines a challengetotheinvestigatorstoproposesolutionstoitsreuse [, ]. What is more, it is a habitual practice to incorporate
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Mechanical Properties of Different Alkali Activated Slag ...
Mechanical properties of different alkali activated slag content 167 yield in different geopolymer strength and properties associated with it. There are few types of geopolymer cement, namely slag based, rock based and fly ash based. The slag based geopolymer cement is discussed in .
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Impact of water content on the performance of alkali ...
alkaliactivated slag concretes A direct correlation between compressive strength and VPV is not identified in the concretes tested (Fig. 1.). However, the concretes produced with a w/b ratio of did, as expected, show the lowest compressive strength and the highest VPV of the materials tested.
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Effect of Curing Conditions on the Compressive Strength ...
of time, temperature, and humidity conditions. The properties of alkali activated GGBS are dependent on the hydration and cement and time. The strength development of alkali activated slag cement concrete cured in water bath, sealed and exposed to air conditions was .
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Alkaliactivated materials: cementing a sustainable future ...
development of alkaliactivated materials using Spanish and Colombian byproducts, specifically alkaliactivated slags. The early work derived from this collaboration demonstrated the high chemical stability of activated slag mortars when exposed to sulfates and seawater (Puertas et al. 2002) and the
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Determination of the Surface Properties of Alkali ...
mortar mixtures of alkali activated slag. And also, the Eskişehir tap water was utilized in the mortar mixtures. The mortar specimens were produced with a mortar mixture that consists of 450 g slag, 1350 g standard sand and 225 g water. The Na 2 SiO 3 and NaOH were used in the mortar
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Microstructural and durability properties of alkali activ ...
Alkali activated binders using slag and fly ash provide a new material in the concrete and construction industry. Made mainly from byproducts or wastes from industries, alkali activated binders have the possibility to provide a sustainable solution for the future of the construction industry.
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ENGINEERING PROPERTIES OF GEOPOLYMER CONCRETE .
The proportioning of the concrete mixture was based on the BRE method targeting a 40 MPa (28 days) compressive strength and a slump of 70 mm. Then, the amount of cement was substituted with the same quantity of natural pozzolan and the amount of water was .
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Analysis on Mechanical properties Durability ...
1. To determine the mechanical properties of alkali activated concrete for varying percentage of GGBS and to arrive at an optimum percentage value 2. Mechanical properties of alkali activated GGBS incorporated concrete with conventional concrete 3. To determine the durability of GGBS incorporated alkali activated concrete and compare it with that of
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The use of alkali activated waste binders in enhancing the ...
The use of alkali activated waste binders in enhancing the mechanical properties and durability of soft alluvial soils. Lookup NU author(s): Paul Sargent, Dr Paul Hughes, Dr Mohamed Rouainia, Maggie White. Downloads. Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
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EFFECT OF ALKALINE SOLUTIONS ON ENGINEERING .
Most engi neering properties of the paste were examined at age of 3, 7, 14, 28 and 56 days. Experi mental results show that a mixed alkaline solution of sodium hydroxide and sodium silicate is necessary to produce an alkali activated GGBFS paste with adequate workability and strength.
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