Resistencia a los sulfatos del cemento Portland normal con ceniza volante

Irassar, Edgardo F.; Batic, Oscar R.

doi:10.3989/mc.1989.v39.i213.813

Cited by 3 publications

(1 citation statement)

References 1 publication

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“…The positive effect of ground coal bottom ash or coal fly ash utilization is evident. This finding has been largely consistent over time with other papers [13,[22][23][24][25][26][27][28]. However, it is quite convenient to consider that wet-dry conditions found in exposure under field conditions will trigger worse results in ground coal bottom ash or coal fly ash mortars as because of their fine microstructure [26], which might enhance capillary absorption [29,30].…”

Section: Length Changesupporting

confidence: 87%

Coal ash Portland Cement Mortars Sulphate Resistance

Menéndez

Argiz

Sanjuán³

2021

Civ Eng J

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Coal fly ash (CFA), coal bottom ash (CBA) are residues produced in thermo-electrical power stations as result of the coal combustion in the same boiler. Therefore, some characteristics of the coal fly ash (CFA) are comparable with those of the coal bottom ash (CBA). Nevertheless, coal bottom ash size is larger than coal fly ash one. Consequently, it was found that it is necessary to grind the coal bottom ash (CBA) to reach a similar size to that one of the CFA. The objective of this paper is to evaluate the performance of Portland cement mortars made with coal fly ash (CFA), coal bottom ash (CBA) or mixes (CFA+CBA), against sulphate attack. The methodology is based on the expansion of slender bars submerged in a sodium sulphate solution (5%) according to the ASTM C-1012/C1012-13 standard. It has been found that mortars elaborated with CEM I 42.5 N (without ashes) presented the largest expansion (0.09%) after a testing period of 330 days. Mortars made with CEM II/A-V exhibited lower expansion (0.03%). Summing up, it can be established that mortar expansion decreases when the coal ash amount increases, independently of the type of coal ash employed. The novelty of this paper relies on the comparison between the performances of Portland cement mortars made with coal fly ash (CFA) or coal bottom ash (CBA) exposed to external sulphate attack. Doi: 10.28991/cej-2021-03091640 Full Text: PDF

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Section: Length Changesupporting

confidence: 87%

Coal ash Portland Cement Mortars Sulphate Resistance

Menéndez

Argiz

Sanjuán³

2021

Civ Eng J

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Mechanical behavior of mortars containing sewage sludge ash (SSA) and Portland cements with different tricalcium aluminate content

Monzó

Payá

Borrachero

et al. 1999

Cement and Concrete Research

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A study on industrial-scale waste utilization in construction material production: the use of fly ash in GRP composite pipe

Beycioğlu

Mis²,

Güner

et al. 2020

Mater. construcc.

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This study presents a new approach to the utilization of industrial by-products in construction materials by using fly ash (FA) in the production of glass fiber-reinforced polyester (GRP) pipe. The FA was substituted by 10% and 20% (by weight of sand) in the mixtures to produce GRP pipes of 350 mm in diameter and 6 m in length for testing. Stiffness modulus (SM), axial tensile strength (ATS), and hoop tensile strength (HTS) tests were conducted on the produced GRP pipes and their elasticity modulus (EM) values were also calculated. To observe the microstructure of the GRP pipes and the interfacial transition zone of the layers, SEM and microscopic analyses were performed. Furthermore, a strain-corrosion test was conducted to obtain information about long term-performance of samples. The results showed that the FA-filled GRP pipes were found to meet the requirements of the related standards, and that the use of FA in the GRP pipe industry may be an important alternative approach to the utilization of industrial wastes via effective recycling mechanisms.

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Resistencia a los sulfatos del cemento Portland normal con ceniza volante

Cited by 3 publications

References 1 publication

Coal ash Portland Cement Mortars Sulphate Resistance

Coal ash Portland Cement Mortars Sulphate Resistance

Mechanical behavior of mortars containing sewage sludge ash (SSA) and Portland cements with different tricalcium aluminate content

A study on industrial-scale waste utilization in construction material production: the use of fly ash in GRP composite pipe

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