Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

Benli, Ahmet; Karataş, Mehmet; Gürses, Elif

doi:10.1016/j.conbuildmat.2017.04.108

Cited by 75 publications

(18 citation statements)

References 44 publications

(53 reference statements)

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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: 66%

“…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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Section: 55 | Strength Activity Indexmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

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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“…Moreover, it has been noted that increasing the proportion of fly ash and silica fume leads to an enhanced reduction in water absorption. Benli et al [14] conducted an experiment to specify the effects of sea water on the mechanical properties and durability of self-compacting mortars containing fly ash and silica fume. The results showed that the tensile strength of ternary mixtures of silica fume and fly ash performed similar and better than the binary mixes of fly ash and silica fume, except for fly ash 10% and silica fume 6%.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Industrial Waste in Cement in a Marine Environment with a Tropical Climate

Chu

Zheng

Chen

et al. 2019

JMSE

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This novel study on cement paste material was conducted with the aim of keeping up with the rapid development of urban construction and contributing to the continuous improvement of building materials to overcome environmental issues. In this study, several kinds of industrial waste were used to enhance the properties of cement paste for application in a marine environment with a tropical climate, such as in Vietnam. This study focuses on evaluating the properties of cement paste containing cement replacement combining 0-30% fly ash, 0-10% silica fume, and plasticizer accounting for 0.3% and 0.4% of the binder by mass. Water demand, chloride ion and sulfate ion permeability, and microstructural properties of the cement paste were determined by thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscope (SEM) and they were investigated after 28 and 56 days. The test results show that an optimum mixture could be obtained with the use of 20% fly ash, 10% silica fume (replacing Portland cement), and 0.4% plasticizer. The application of such materials to sea dikes affected by a tropical climate (characterized by heat, humidity, salty seawater, many big storms, large waves, and strong tides) was investigated for four years on the Vietnamese coast. The test results indicate that fly ash and silica fume can improve the corrosion and abrasion resistance of concrete in coastal areas with a tropical climate, such as in Vietnam.

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“…(2017) studied effect of MgSO4 and seawater on durability of self-compacting mortar produced with fly ash and silica fume. Property loss was reported due to surface cracks due to softening [21]. On the base listed studies above, the objective of this experimental study is to investigate the effect of curing and macro-fiber amount on the 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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Effect of sea water and MgSO4 solution on the mechanical properties and durability of self-compacting mortars with fly ash/silica fume

Cited by 75 publications

References 44 publications

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

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

Utilization of Industrial Waste in Cement in a Marine Environment with a Tropical Climate

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

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