An experimental study of different curing regimes on the mechanical properties and sorptivity of self-compacting mortars with fly ash and silica fume

Benli, Ahmet; Karataş, Mehmet; Bakır, Yakup

doi:10.1016/j.conbuildmat.2017.03.228

Cited by 118 publications

(40 citation statements)

References 32 publications

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“…On the other hand, SF and FA mixtures showed the lowest overall absorption during the seven-day testing period. This result is in agreement with the literature [60,61]. It is worth noting that all mixtures had a lower overall absorption than the standard mixture except for slag cement which exhibited the highest initial absorption.…”

Section: Density Absorption and Void Ratiosupporting

confidence: 92%

Field Validation of Concrete Transport Property Measurement Methods

et al. 2020

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Reinforcing steel corrosion, caused by chloride ingress into concrete, is the leading cause of reinforced concrete deterioration. One of the main findings in the literature for reducing chloride ingress is the improvement of the durability characteristics of concrete by the addition of supplementary cementitious materials (SCMs) and/or chemical agents to concrete mixtures. In this study, standard ASTM tests—such as rapid chloride permeability (RCPT), bulk diffusion and sorptivity tests—were used to measure concrete properties such as porosity, sorptivity, salt diffusion, and permeability. Eight different mixtures, prepared with different SCMs and corrosion inhibitors, were tested. Apparent and effective chloride diffusion coefficients were calculated using bound chloride isotherms and time-dependent decrease in diffusion. Diffusion coefficients decreased with time, especially with the addition of SCMs and corrosion inhibitors. The apparent diffusion coefficient calculated using the error function was slightly lower than the effective diffusion coefficient; however, there was a linear trend between the two. The formation factor was found to correlate with the effective diffusion coefficient. The results of the laboratory tests were compared and benchmarked to their counterparts in the marine exposure site in the Arabian Gulf in order to identify laboratory key tests to predict concrete durability. The overall performance of concrete containing SCMs, especially fly ash, were the best among the other mixtures in the laboratory and the field.

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Section: Density Absorption and Void Ratiosupporting

confidence: 92%

Field Validation of Concrete Transport Property Measurement Methods

et al. 2020

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“…Because SF has high surface area with extremely fine particle sizes, the water demand of mortar mixes containing SF increases and results in decreasing the flowability of SCMs as noted in the previous studies. 11,32,33 Hence, SF mixes with larger replacement ratios have larger w/b ratios than that of SF mixes with low replacement ratios in this study. In general, fresh performance of SF mixes performs worse than that of the control mixes.…”

Section: 55 | Strength Activity Indexmentioning

confidence: 70%

“…Unlike binary mixtures of SCMs with SF, the enhancement of compressive strength gets better as SF content rises from 5% to 15% with the ternary combination of FA10 aged 28 days. Ternary mixes of SCMs incorporating FA10 develop better structural properties at later ages …”

Section: Resultsmentioning

confidence: 99%

“…Ternary mixes of SCMs incorporating FA10 develop better structural properties at later ages. 22,32,33 Figure 6 represents the compressive strength change for binary mixes and ternary mixes of FA and SF aged 7, 28, and 180 days. As shown in Figure 6a, at the age of 28 and 90 days, the compressive strength of FA mixes decreases slowly by increasing the replacement ratio of 20% then a sharp decrease is observed at the content of 25% for the early ages of 7 and 28 days but at later age of 180 days a sharp decline is seen at the FA content of 10%.…”

Section: Compressive Strengthmentioning

confidence: 99%

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Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Benli

2019

Structural Concrete

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In this paper, the results of experimental work on the strength and durability performances of self‐compacting mortars (SCMs) manufactured from silica fume (SF) and fly ash (FA) were presented. The cement was partially replaced with 5, 10, 15, 20, and 25% of FA and 5, 10, and 15% of SF as binary mixes. Also, ternary mixtures were prepared by the incorporation of FA and SF at different replacement dosages by weight. In total, 14 different combinations of mixes were studied at the ages of 7, 28, and 180 days. Prismatic samples of size 40 × 40 × 160 mm3 were produced and exposed to water curing to observe mechanical behavior of SCMs. The mechanical properties of SCMs were examined by the tests of compressive strength and flexural strength. Sorptivity, porosity, water absorption, and density were also measured. To evaluate fresh properties of SCMs, mini slump flow diameter and mini V‐funnel flow time tests were conducted. The results of the study reveal that increase in the dosage of FA increases SCMs flow but also reduce segregation resistance. The enhancement in flexural strength is the best in the binary mixes of SF10 and in binary mixes of FA. Ten percent replacement of FA shows the best flexural strength performance with a value of 10.21 MPa at the age of 180 days. Compressive and flexural strengths of mortars containing SF and FA reached up to about 86.14 and 10.50 MPa, respectively.

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“…Their study aimed to investigate effect of curing regime on self-compacting mortar produced with fly ash and silica fume. It was emphasized that the best results were obtained from 10% fly ash as a single additive at 280 days curing age and 10% silica fume and 6% fly ash binary combination at wet sack curing [19]. Karataş et al (2017) investigated effect of ground pumice powder on durability properties of self-compacting mortar.…”

Section: Introductionmentioning

confidence: 99%

Properties of Self-Compacting Mortars with Different Contents of Synthetic Macro Fiber

Etli¹,

Cemalgil²,

Onat³

2018

acperpro

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This study is devoted to investigating engineering properties of Self-Compacting Mortar (SCMs) produced with synthetic macro fiber. For this purpose, five different mix designs were prepared with a constant w/c ratio of 0.55 to sustain self-compatibility. Fiber content in these mixtures were changed from 0% to 5%. Engineering properties were investigated in terms of workability, mechanical properties and abrasion resistance. Compressive strength and flexural strength tests were conducted on the specimens exposed to three different water curing age 7 days, 28 days and 56 days respectively. In this study, also optimum synthetic fiber amount was determined to sustain self-compatibility of mortar. It was revealed that 2 and 3 kg/m3 synthetic macro fiber ratio are the key proportions to improve workability and flexural strength properties of hardened mortar. Moreover, adding fiber to mortar decreased abrasion resistance at 28 days age. In reverse, fiber addition increased abrasion resistance at 56 days age.

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An experimental study of different curing regimes on the mechanical properties and sorptivity of self-compacting mortars with fly ash and silica fume

Cited by 118 publications

References 32 publications

Field Validation of Concrete Transport Property Measurement Methods

Field Validation of Concrete Transport Property Measurement Methods

Mechanical and durability properties of self‐compacting mortars containing binary and ternary mixes of fly ash and silica fume

Properties of Self-Compacting Mortars with Different Contents of Synthetic Macro Fiber

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