Influence of type and maximum aggregate size on some properties of high-strength concrete made of pozzolana cement in respect of binder and carbon dioxide intensity indexes

Grabiec, Anna M.; Zawal, Daniel; Szulc, Jakub

doi:10.1016/j.conbuildmat.2015.08.108

Cited by 30 publications

(9 citation statements)

References 14 publications

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“…These results indicate that the water absorption increase as the level of PW increased where the absorption percentage increased linearly from 6.7% for concrete mixture contains 20% PW aggregate up to 13.1% for concrete mixture contains 100% PW aggregate. In general, the absorption of concrete mixtures containing PW aggregate were higher than that of control mix with 4.5% at least (case of 20% PW aggregate).This results corresponds to the results reported by Grabiec et al [20] .This property is due to porosity of PW aggregate that relatively higher than that of dolomite increase of the lightweight aggregate increased the void and the percentage of pore area in the LWAC that was caused increase of waster adsorption. Fig.5 shows the test results of compression test at different curing time of 7, 28 and 56 days.…”

Section: Water Absorptionsupporting

confidence: 88%

Mechanical Properties of lightweight Concrete Produced using Pottery Waste as Aggregate

Shaaban*

2019

IJRTE

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Structures built using lightweight concrete have feature of the lower own weight than that of the conventional concrete, where this property contributes to reducing the construction cost. This paper study recycling of pottery waste (PW) to use it as aggregate to develop structural lightweight concrete. To achieve this aim, six concrete mixtures were prepared. Five mixes developed using PW of 20%, 40 %, 60%, 80%, and 100% as a partially and wholly replacement of normal weight aggregate, while the control mix produced using normal weight aggregate of dolomite. The properties; consistency, dry density, water absorption, compressive, tensile and flexural strengths were studied and compared with the same properties of the control mix. Experimental results indicate that using 40, 60, 80, and 100% of PW as dolomite replacement can produce lightweight concrete, also all concrete mixtures containing PW aggregate can classified as structural concrete where their compressive strengths are more than 17 Mpa.

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Section: Water Absorptionsupporting

confidence: 88%

Mechanical Properties of lightweight Concrete Produced using Pottery Waste as Aggregate

Shaaban*

2019

IJRTE

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“…The reduction in the volume of water leads to an increase in the amount of cement by cubic meter, increasing the cost of the concrete and negatively affecting the environmental benefits derived from the use of recycled aggregates. Hence, the Binder Intensity [25,26] has been calculated. This value has been obtained by measuring the reduction in volume and resistance to compression and the amount of cement per cubic meter required to increase the resistance by 1 MPa.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Influence of curing conditions on recycled aggregate concrete

Sainz-Aja

Setién

Polanco

et al. 2020

Advances in Construction and Demolition Waste Recycling

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The search for ways of using recycled aggregate (RA) from construction and demolition wastes (C&DW) in the production of recycled aggregate concrete (RC) has been going on for many years. Most researchers agree about the reduction in the physical and mechanical properties and the durability [1]. However, there are no comparable results on the durability of RC exposed to marine environments due to the heterogeneity of the RA, the w/c ratios and the types of cement used in different countries. Different studies [1][2][3][4] show that permeability, carbonation and risk of reinforcement corrosion increase when RC is used. However, no information is found in the literature about how the w/c ratio and capillary network affect the durability of RC exposed to a marine environment. A recent study shows that the durability of recycled concrete depends on the quality of the RA and that the most suitable RA comes from precast-structural concretes [2]. Also, several studies have analysed the behaviour of RC under cyclic stress (fatigue) [5][6][7][8], showing that the negative effect of the incorporation of recycled aggregate is significantly higher in the case of dynamic rather than static conditions. Other authors have found solutions, using other recycled materials, to improve the properties of the cement paste. Using this method, the effect of the RA [9] can be minimised, not only in nocement but also in polymeric matrixes [10]. The use of RA containing contaminants such as sulphur and properties of recycled aggregate mortar (RAM) and RC has also been studied [11], finding a reduction in the quality of the concrete proportional to the quality of the recycled aggregate. This paper presents the results of a study of permeability and its influence on the durability of recycled concrete exposed to an aggressive environment. On the one hand, the effect of RA on concrete properties has been analysed by studying the same w/c ratios and, on the other hand, the influence of the w/c ratio and its capillary network has been measured for equivalent degrees of RA. With this aim, RC with 20%, 50% and 100% wt of RA and 24 effective w/c ratios have been exposed directly to a marine environment. Experimental programInfluence of curing conditions on recycled aggregate concrete C. Thomas a, ⁎

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“…For the MS content, the compressive strength increased with increasing MS content from 0 to 15 % by weight of fluidized bed coal-bark fly ash. The particles of silica fume were very small and highly amorphous phase could react quite quickly [18]. For example, the compressive strengths at 28 days of mixes with L/FA of 0.9 with volume of MS of 0, 5, 10, and 15 % by weight were 9.8, 18.6, 24.5, and 34.5 MPa, respectively.…”

Section: Series Msmentioning

confidence: 99%

Fluidized Bed Coal-Bark Fly Ash Geopolymer With Additives Cured at Ambient Temperature

Chindaprasirt¹

2019

GEOMATE

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In this research, the properties of fluidized bed coal-bark fly ash geopolymer mortar containing additives viz., ordinary Portland Cement (OPC) and micro silica (MS) were studied. The fluidized bed coalbark fly ash was a waste from a power plant boiler in Khon Kaen, Thailand. The geopolymer mortar was made from fluidized bed coal-bark fly ash, sand, sodium silicate solution, NaOH solution, and additives. The additives were used to replace the fluidized bed coal-bark fly ash at the level of 0 -15 % by weight. The mortars with liquid alkaline/ash ratios of 0.9-1.4, sodium silicate/NaOH ratios of 0.33-3.00, NaOH concentrations of 5-15 molars, OPC and micro silica contents of 0 -15 % by weight of fly ash, and curing at ambient temperature were tested. The geopolymer mortars with 28-day compressive strengths between 5.5 and 27.0 MPa and densities between 1970 and 2175 kg/m 3 were obtained. The addition of OPC and micro silica enhanced the strength development of geopolymer mortar with the optimum OPC content of 10 % and micro silica content of 15 %. It is shown here that the fluidized bed coal-bark fly ash geopolymer mortar containing OPC and micro silica as additives with ambient temperature curing possesses sufficient strength. The use of this product can reduce the energy consumption in cement production and increases the sustainability of construction industry.

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Influence of type and maximum aggregate size on some properties of high-strength concrete made of pozzolana cement in respect of binder and carbon dioxide intensity indexes

Cited by 30 publications

References 14 publications

Mechanical Properties of lightweight Concrete Produced using Pottery Waste as Aggregate

Mechanical Properties of lightweight Concrete Produced using Pottery Waste as Aggregate

Influence of curing conditions on recycled aggregate concrete

Fluidized Bed Coal-Bark Fly Ash Geopolymer With Additives Cured at Ambient Temperature

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