Permeability properties of self-consolidating concrete containing various supplementary cementitious materials

Ahari, Reza Saleh; Erdem, Tahir Kemal; Ramyar, Kambiz

doi:10.1016/j.conbuildmat.2015.01.053

Cited by 73 publications

(7 citation statements)

References 33 publications

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“…Furthermore, replacing the cement with 80% of Replacing cement with less than 15% silica fume (5% and 10% in this study) produces compressive strength less than the control mix after three and seven days of curing, which is indicated by Figure 3 and Table 4. This is consistent with the findings in the literature [23]. Figure 4 shows the binary SCC mixes in which cement was replaced with 10% to 60% GGBS matched or exceed the 28-day compressive strength of the control mix.…”

Section: Development Of Compressive Strength In Sustainable Scc Mixessupporting

confidence: 91%

Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete

Mohamed

2018

Buildings

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This study examines durability and mechanical properties of sustainable self-consolidating concrete (SCC) in which 80% of the cement is replaced with combinations of recycled industrial by-products including fly ash, silica fume, and ground granulated blast furnace slag (GGBS). The water to binder (w/b) ratio of SCC mixes studies was maintained at 0.36. The study proposes empirical relationships to predict 28-day compressive strengths based on the results of three-day and seven-day compressive strengths. In addition, the chloride penetration resistance of the various sustainable SCC mixes was determined after three days, seven days, and 28 days of moist curing of concrete standards. It was concluded that fly ash, silica fume, and GGBS contribute favorably to enhancing strength development, fresh properties, and durability of SCC in comparison to ordinary Portland cement (OPC). The compressive strength of the sustainable SCC mixes falls within ranges suitable for structural engineering applications. Replacing cement with 15% silica fume produced a 28-day average compressive strength of 95.3 MPa, which is 44.2% higher than the control mix. Replacing cement with 15% or 20% silica fume reduced the chloride ion permeability to very low amounts compared to high permeability in a control mix. replacement of cement in SCC mixes results in loss of concrete compressive strength during the early stages, but, in many cases, a significant increase in compressive strength develops during later stages.Adding 3.8% silica fume improves compressive strength, splitting, tensile strength, and durability of SCC mixes Quercia [5]. It was found that replacing 15% of cement by silica fume resulted in a 28-day compressive strength of 95.3 MPa, which was 44% higher than the control SCC mix examined in the study by Mohamed and Najm [6]. Due to their spherical morphology, which reduces inter-particle friction, both silica fume and fly ash enhance workability and is essential for producing high strength concrete.Partial replacement of cement in SCC with various industrial byproduct wastes such as limestone power, cement kiln dust, and pulverized steel slag improves resistance to chloride penetration [7]. Other studies, however, contend that, under laboratory conditions, the durability of SCC and traditional vibrated concrete may be comparable [8] and that using Rapid Chloride Penetration Test (RCPT) to assess durability of SCC does not produce reliable results. However, the same study acknowledges that the quality of compacting vibrated concrete onsite is unlikely to reach the quality of SCC. As a result, concrete structures built with SCC may still be more durable.Partial replacement of cement with GGBS in SCC enhances compressive strength and durability. In one study, it was shown that replacing 70% of cement in a particular SCC mix resulted in strength as high as the control SCC mix [9].Alkali-silica reaction (ASR) may lead to significant long-term damage and degradation of concrete properties [10]. GGBS is known to improve concrete resis...

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Section: Development Of Compressive Strength In Sustainable Scc Mixessupporting

confidence: 91%

Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete

Mohamed

2018

Buildings

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“…Besides, incorporation of different mineral admixtures in ternary and quaternary binders can have a considerable synergistic effect on both fresh and hardened properties of the concrete. Moreover, utilizing byproducts or wastes as alternative cementitious materials in concrete provides a more sustainable concrete technology through the creation of a balance between development and environment [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Time-dependent rheological characteristics of self-consolidating concrete containing various mineral admixtures

Ahari

Erdem

Ramyar

2015

Construction and Building Materials

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h i g h l i g h t sTime-dependent rheology of SCC with various mineral admixtures was investigated. Apparent yield stress and thixotropy of SCC increased significantly with time. Time-dependent torque plastic viscosity values changed only in a limited range. Viscosity and yield stress were affected mostly by metakaolin and Class C fly ash. Metakaolin and silica fume, had more influence on thixotropy as time was elapsed. a r t i c l e i n f o t r a c tThe study herein was intended to evaluate the influence of elapsing time on rheological properties and thixotropy of self-consolidating concrete (SCC) mixtures containing various mineral admixtures. For this purpose, variation of T 50 flow time, torque plastic viscosity, apparent yield stress and thixotropy were investigated as a function of time in a standstill condition. Various amounts of silica fume (SF), metakaolin (MK), Class F fly ash (FAF), Class C fly ash (FAC) and granulated blast-furnace slag (BFS) were utilized in binary, ternary and quaternary cementitious blends in 17 different SCC mixtures having a constant slump flow value. The results showed that SCC mixtures containing various mineral admixtures were highly stable or moderately stable (VSI between 0 and 1) at 0 min according to ASTM C 1611. However, mixtures containing FAC, FAF and BFS exhibited some bleeding and segregation at 50 min. In a standstill condition, apparent yield stress and thixotropy increased significantly with time while torque plastic viscosity values changed only in a limited range. In addition, with elapsing time, MK and FAC were found to have more influence on torque plastic viscosity and yield stress values in comparison with the other admixtures. However, increase in the yield values were more pronounced in comparison with the torque plastic viscosity values. Increase in thixotropy with time for the SF and MK blended mixtures were higher when compared to the control mixtures and mixtures containing the other mineral admixtures.

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“…This parameter indicates the ease or difficulty of penetration of a fluid into capillary pores of cement‐based materials by hydrostatic pressure, which means the more capillary pores are connected to each other, the easier water penetrates into capillary pores 22 . It can be seen that WPD of a particular mixture in w / b ratio of 0.40 is lower than WPD of its counterpart in w / b of 0.50, which shows that lower w / b ratio results in lower volume of capillary pores that are less connected to each other.…”

Section: Resultsmentioning

confidence: 99%

“…Silica fume (SF) and natural zeolite (NZ) are among the SCMs which are being used in many parts of the world and they significantly improve impermeability under hydrostatic pressure 19–21 . They are also beneficial for increasing electrical resistivity 19–21 and reducing rapid chloride migration index (RCMI) 22,23 . However, the effects of SF and NZ on permeability under nonhydrostatic pressure are not as clear as their effects on permeability under hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

Properties of cement‐based materials containing calcium stearate and supplementary cementitious materials

Chari¹,

Naseroleslami

Ahmadi³

2023

Structural Concrete

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Calcium stearate (CS) is effective to reduce permeability of different building materials under nonhydrostatic pressure but more actions need to be taken to shed light on its main and side effects on properties of cement‐based materials. This research project investigates the effect of CS on properties of these materials. Compressive strength analysis shows that the addition of CS at the dosage of 1% of cement weight reduces this parameter by approximately 20% but reducing water‐to‐binder ratio, and replacing 7.5% of cement weight with silica fume (SF) compensate for the strength loss caused by CS. Results of drying shrinkage test show that the addition of CS slightly increases drying shrinkage but replacing 7.5% of cement weight with SF can compensate for the negative effects of CS on drying shrinkage. Permeability analysis shows that CS is not as effective as SF and natural zeolite (NZ) to improve impermeability under hydrostatic pressure but it is more effective than SF and NZ to improve impermeability under nonhydrostatic pressure because the addition of CS at the dosage of 1% of cement weight reduces capillary water absorption by roughly 60%. Therefore, the simultaneous use of CS and these supplementary cementitious materials improves not only impermeability under hydrostatic pressure but also impermeability under nonhydrostatic pressure.

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Permeability properties of self-consolidating concrete containing various supplementary cementitious materials

Cited by 73 publications

References 33 publications

Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete

Durability and Compressive Strength of High Cement Replacement Ratio Self-Consolidating Concrete

Time-dependent rheological characteristics of self-consolidating concrete containing various mineral admixtures

Properties of cement‐based materials containing calcium stearate and supplementary cementitious materials

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