Compressive strength and chloride resistance of self-compacting concrete containing high level fly ash and silica fume

Wongkeo, Watcharapong; Thongsanitgarn, Pailyn; Ngamjarurojana, Athipong; Chaipanich, Arnon

doi:10.1016/j.matdes.2014.07.042

Cited by 217 publications

(90 citation statements)

References 19 publications

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“…At 28 days, the water absorption of the POC concrete was in the range of 35% to 80%, higher than that of the control mix. The water absorption has a direct relationship with the voids, the absorption increased as the voids increased [43]. A similar trend was observed in the results obtained by Teo et al (2010) [44], which indicated that the high porosity of OPS aggregate increased the water absorption of the concrete as compared to the conventional concrete, like other lightweight aggregates concrete.…”

Section: Water Absorptionsupporting

confidence: 83%

“…At 28 days, the water absorption of the POC concrete was in the range of 35% to 80%, higher than that of the control mix. The water absorption has a direct relationship with the voids, the absorption increased as the voids increased [43]. A similar trend was observed in the results obtained As shown in Figure 25, among all of the equations, the MOE values of the POCP concrete at 28 days was close to and comparable with the values calculated using Equations (7), (8), and (10) as recommended by BS 8110, ACI 318 [35], and Noguchi et al (2009) [38], respectively, for predicting the elastic modulus MOE of concrete in terms of its compressive strength and density.…”

Section: Water Absorptionmentioning

confidence: 99%

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Effect of Coating Palm Oil Clinker Aggregate on the Engineering Properties of Normal Grade Concrete

2017

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Palm oil clinker (POC) is a waste material generated in large quantities from the palm oil industry. POC, when crushed, possesses the potential to serve as an aggregate for concrete production. Experimental investigation on the engineering properties of concrete incorporating POC as aggregate and filler material was carried out in this study. POC was partially and fully used to replace natural coarse aggregate. The volumetric replacements used were 0, 20%, 40%, 60%, 80%, and 100%. POC, being highly porous, negatively affected the fresh and hardened concrete properties. Therefore, the particle-packing (PP) method was adopted to measure the surface and inner voids of POC coarse aggregate in the mixtures at different substitution levels. In order to enhance the engineering properties of the POC concrete, palm oil clinker powder (POCP) was used as a filler material to fill up and coat the surface voids of POC coarse, while the rest of the mix constituents were left as the same. Fresh and hardened properties of the POC concrete with and without coating were determined, and the results were compared with the control concrete. The results revealed that coating the surface voids of POC coarse with POCP significantly improved the engineering properties as well as the durability performance of the POC concrete. Furthermore, using POC as an aggregate and filler material may reduce the continuous exploitation of aggregates from primary sources. Also, this approach offers an environmental friendly solution to the ongoing waste problems associated with palm oil waste material.

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Section: Water Absorptionsupporting

confidence: 83%

“…At 28 days, the water absorption of the POC concrete was in the range of 35% to 80%, higher than that of the control mix. The water absorption has a direct relationship with the voids, the absorption increased as the voids increased [43]. A similar trend was observed in the results obtained As shown in Figure 25, among all of the equations, the MOE values of the POCP concrete at 28 days was close to and comparable with the values calculated using Equations (7), (8), and (10) as recommended by BS 8110, ACI 318 [35], and Noguchi et al (2009) [38], respectively, for predicting the elastic modulus MOE of concrete in terms of its compressive strength and density.…”

Section: Water Absorptionmentioning

confidence: 99%

Effect of Coating Palm Oil Clinker Aggregate on the Engineering Properties of Normal Grade Concrete

2017

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“…After that, the same method was applied for determining the packing density of the binary Particle packing of cement and silica fume in pastes using an analytical model mixture of cement and silica fume, being established a proportion of 85% cement and 15% silica fume by weight. These values were chosen based on the literature, which indicates the percentage of 15% of silica fume as the maximum value for the use together with cement [3,12,13,14,15], as mentioned before. The materials mix proceeding is shown in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…This contributes to the densification of both the cement paste and the interfacial transition zone, producing a denser microstructure, with a smaller voids ratio [2,9,10,11]. Usually, the silica fume is used in amounts ranging from 5 to 15% by cement weight [3,12,13,14,15]. In this range, the addition of silica fume can improve the workability of the mix because its particles fill the voids between the cement grains.…”

Section: Introductionmentioning

confidence: 99%

Particle packing of cement and silica fume in pastes using an analytical model

Hermann

Langaro

Silva

et al. 2016

Rev. IBRACON Estrut. Mater.

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ResumoWhen added to concrete in appropriate content, silica fume may provide an increase in the mechanical strength of the material due to its high pozzolanic reactivity. In addition to the chemical contribution, physical changes can also be observed in concretes with silica fume due to an improvement in the particle packing of the paste. This is a result of their small size spherical particles, which fill the voids between the larger cement grains. However, it is necessary to properly establish the cement replacement content by silica fume, because at high amounts, which exceed the volume of voids between the cement particles, silica fume can promote the loosening of these particles. Thus, instead of filling the voids and increasing the packing density, the addition of silica fume will increase the volume of voids, decreasing the solid concentration. Consequently, this will impair the properties of the concrete. The objective of this paper is to use a particle packing analytical model, the CPM (Compressible Packing Model), to verify the maximum packing density of cement and silica fume, which could be associated with the silica fume optimum content in pastes. The ideal content of silica fume in pastes, mortars and concretes is usually experimentally determined. However, a theoretical study to contrast experimental data may help understanding the behaviour of silica fume in mixes. Theoretical results show maximum amounts of silica fume in the order of 18 to 20% of the cement weight, which is high considering recommendations on literature of 15%. Nevertheless, the packing model does not consider the effect of silica fume high specific surface on the agglomeration of particles or water demand. Hence, the packing density predicted by this model cannot be used as the single parameter in determining the optimum amount of silica fume in pastes.Keywords: silica fume; packing of fine particles; wet packing; analytical model; CPM.Pela sua pozolanicidade e alta reatividade, a sílica ativa, quando adicionada ao concreto em porcentagens adequadas, pode proporcionar um aumento na resistência mecânica do material. Além da contribuição química, alterações físicas no concreto com sílica ativa também são observadas pela melhora no empacotamento de partículas na pasta, resultado de suas pequenas partículas esféricas que preenchem os vazios entre os grãos de cimento, de maior tamanho. Para tanto, é necessário prever o teor de substituição adequadamente, pois em teores muito elevados, que superem o volume de vazios entre as partículas de cimento, a sílica pode promover o afastamento destas partículas. Assim, ao invés de preencher os vazios e aumentar a densidade de empacotamento, a adição de sílica irá aumentar o volume de vazios, diminuindo a concentração de sólidos na pasta e, consequentemente, prejudicando as propriedades do concreto. Dessa forma, o objetivo deste trabalho é utilizar um modelo analítico de empacotamento de partículas, o CPM (do inglês Compressible Packing Model), para verificar a densidade de empacotame...

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“…Previous researchers have reported that blast furnace slag or pozzolans such as fly ash, silica fume, rice husk ash, and bagasse ash can be used to partially replace OPC in concrete mixture [5][6][7][8][9][10]. POFA has been introduced as a pozzolanic material in concrete and most studies of POFA have focused on the mechanical properties of concrete such as compressive strength and modulus of elasticity of concrete [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Influence of Palm Oil Fuel Ash and W/B Ratios on Compressive Strength, Water Permeability, and Chloride Resistance of Concrete

Sanawung

Cheewaket

Tangchirapat

et al. 2017

Advances in Materials Science and Engineering

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This research studies the effects of W/B ratios and palm oil fuel ash (POFA) on compressive strength, water permeability, and chloride resistance of concrete. POFA was ground until the particles retained on sieve number 325 were less than 5% by weight. POFA was used to partially replace OPC at rates of 15, 25, and 35% by weight of binder. The water to binder (W/B) ratios of concrete were 0.40 and 0.50. The compressive strength, water permeability, and chloride resistance of concrete were investigated up to 90 days. The results showed that POFA concrete with W/B ratio of 0.40 had the compressive strengths ranging from 45.8 to 55.9 MPa or 82-94% of OPC concrete at 90 days, while POFA concrete with W/B ratio of 0.50 had the compressive strengths of 33.9-41.9 MPa or 81-94% of OPC concrete. Furthermore, the compressive strength of concrete incorporation of ground POFA at 15% was the same as OPC concrete. The water permeability coefficient and the chloride ion penetration of POFA concrete were lower than OPC concrete when both types of concrete had the same compressive strengths. The findings also indicated that water permeability and chloride ion penetration of POFA concrete were significantly reduced compared to OPC concrete.

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Compressive strength and chloride resistance of self-compacting concrete containing high level fly ash and silica fume

Cited by 217 publications

References 19 publications

Effect of Coating Palm Oil Clinker Aggregate on the Engineering Properties of Normal Grade Concrete

Effect of Coating Palm Oil Clinker Aggregate on the Engineering Properties of Normal Grade Concrete

Particle packing of cement and silica fume in pastes using an analytical model

Influence of Palm Oil Fuel Ash and W/B Ratios on Compressive Strength, Water Permeability, and Chloride Resistance of Concrete

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