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Showing 1 to 20 of 31 for “"GGBS"”.
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Ternary combination concretes using GGBS, fly ash & limestone: strength, permeation & durability properties
… such as ground granulated blast-furnace slag (GGBS) and fly ash, which have found greater use due to the benefits they provide to many properties of the material (in addition to environmental impact). While studies have investigated these materials in binary blends with CEM I, little work has …
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The performance of a blended PFA/GGBS alkali-activated concrete using a silica fume-based activator
… activator (Regime B) chemically activating PFA: GGBS mix compositions (50PFA: 50GGBS, 40PFA: 60GGBS, 30PFA: 70GGBS, 20PFA: 80GGBS) combined with a range of water-to-binder ratio’s 0.40, and 0.42 showed promising results from a minimum performance perspective (≥ C32/40 compressive strength class …
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Mix design, fresh and hardened properties and microstructural characterisation of alkali-activated concrete based on PFA/GGBS blends
… of salient parameters such as percentage of GGBS in PFA/GGBS blend, paste content, binder content, water-to- solid ratio (w/s) on setting time, workability and compressive strength of AAC is investigated. The findings obtained from this investigation helped to suggest mix design guidelines …
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DEVELOPMENT OF SELF-HEALING SUSTAINABLE CONCRETE USING RECYCLED MATERIALS
… with ground granulated blast furnace slag (GGBS) and polyvinyl alcohol (PVA) fiber in terms of flexural strength recovery and crack sealing behavior. 50% GGBS-blended concrete was found to have good autogenous healing ability and the addition of PVA fibers indirectly further increases the …
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Stabilisation of clay subgrade soils using ground granulated blastfurnace slag
… benefits. Ground granulated blastfurnace slag (GGBS), a by-product material in Egypt, and lime are used in the current work to stabilise samples of a clay soil similar to a typical Egyptian clay soil. This test soil comprises 80% River Aire soil and 20% calcium montmorillonite. The main …
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Water absorption and salt attack resistance of coal ash brick made of different percentage of foam content
… by-product, ground granulated blastfurnace slag (GGBS) which is activated with an alkaline (hydrated lime or Portland cement) combined with coal ash from coal-fired thermal power plant. The blended binder comprising of hydrated lime (HL) – GGBS and Portland cement (PC) –GGBS were used to stabilize …
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Development of technology for the construction of low-cost road embankments
… ratios were established as follows: 16%Lime-0%GGBS, 12%Lime-4%GGBS, 8%Lime-8%GGBS, 4%Lime-12%GGBS and 0%Lime-16%GGBS and tested at moisture contents of 23%, 28%, 33% and 38%. The two extremes 16%Lime-0%GGBS and 0%Lime-16GGBS were used as controls.<br/><br/>A system of elimination based on …
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Influence of curing on the properties of concretes and mortars in hot climates
… (pfa) and ground granulated blast-furnace slag (ggbs). Three 00 environments were chosen as follows: 1) 20C+70%RH, 2) 35C+70%RH, and 3) 45C+30%RH. To simulate in-place casting, the initial mix temperatures were controlled to be as close as possible to that of the environment in which the mixes …
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Stabilisation of sulphide rich soil: problems and solutions
… agent (ground granulated blast furnace slag - GGBS - incorporated at various percentage additions (2%, 4%, 6% or 8%)) on the strength development, linear expansion and durability of mellowed, lime-modified LOC is presented. For comparative purposes, Portland cement (PC) is also used. The …
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Property Changes and Mechanisms in Lime-Stabilised Kaolinite in the Presence of Metal Sulphates
… of ground granulated blastfurnace slag (GGBS), which is used with Portland Cement (PC) and PC-blends to combat sulphate attack in concrete, would impart similar sulphate resistance when included with lime in the stabilisation of clay soils.<br/><br/>In order to achieve these objectives, …
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Engineering properties of sulphate-bearing clay soils stabilised with lime-activated ground granulated blast furnace slag (GCBS)
… of ground granulated blast furnace slag (ggbs), activated by 2% calcium hydroxide (Ca(OH)<sub>2</sub>, on the strength, permeability and porosity development of a laboratory prepared clay mix (kaolinite with and without 6% gypsum) and a natural sulphide-bearing clay soil, Lower Oxford …
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Role of cement content in determining resistance of concrete to reinforcement corrosion
… lower absorption aggregates and PC / PFA or PC / GGBS, instead of PC. Cement reduction at fixed w/c ratio below the given minimum cement contents in current specifications had a minor adverse effect on the carbonation resistance of concrete, particularly when the fines content was allowed to …
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A site-based study of durability indexes for concrete in marine conditions
… in the Port of East London (Eastern Cape). GGBS, FA and CSF were selected as extenders as it is well established that these extenders enhance the durability properties of concrete, relative to plain unblended concretes. The test elements modelled two structural elements in the Port viz. a …
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Soil stabilization utilising wastepaper sludge ash
… or with Ground Granulated Blastfurnace Slag (GGBS). The engineering behaviour (plasticity characteristics, compaction, unconfined compressive strength (UCS), linear expansion and California Bearing Ratio (CBR)) of the sulfate-bearing Lower Oxford Clay (LOG) soil and of a non sulfate-bearing …
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The Development of Sustainable Lime-Based Building Wall Components
… with Ground Granulated Blast-furnace Slag (GGBS) an industrial by-product from the manufacture of steel. During the preliminary phase of the research, two different approaches to establishing the moisture demand during compaction of test specimens were investigated, using both LOC and …
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The development of a geopolymer binder from the interbasaltic laterites of Northern Ireland
… focused on Ground Granulated Blastfurnace Slag (GGBS), Fly ASH (FA) or Metakaolin (MK) as primary raw materials or precursors. GGBS and FA are both by-products from other processes and as such have a limited longevity of supply. Pure MK is prohibitively expensive. These factors result in …
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Rapid assessment of the potential chloride resistance of structural concrete
… the general order of (from best to worst) ggbs> fly ash> silica fume> limestone> CEM I. It was also postulated that there is a limit to the benefit of reducing water-cement ratio to improve durability. This is because of at very low water cement ratio, concrete may develop autogenous …
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The development of unfired clay building materials for sustainable building construction
… by-product (Ground Granulated Blastfurnace Slag-GGBS) to stabilise Lower Oxford Clay (LOC). Portland cement was used in the formulation of the unfired clay brick tests specimens predominantly as a control. The development of an unfired clay brick in this current work is considered by the …
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Abrasion resistance of IV-RCC used to construct spillway concrete steps of South African dams
… concrete, fly ash concrete and slag (GGBS) concrete. DWS uses fly ash in the majority of their mass concrete projects due to its pozzolanic properties which help slowing down the heat of hydration. The slag was included in these mixes in order to have available results when it is used …
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Assessing the influence of crack width on the durability potential of cracked concrete using the durability index approach
… (100% CEM I 52.5N (PC), 70/30 PC/FA and 50/50 PC/GGBS). 100 x 100 x 500 mm beams were cast and cracks were induced after seven days in the mid-span of each beam using three-point loading. Two crack width ranges were investigated; 0.1-0.4 mm (wcr1) and 0.5-0.8 mm (wcr2). The central section of the …
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