Control of thermal cracking in mass concrete with blast-furnace slag cement

Miyazawa, S.; Koibuchi, Kiyoshi; Hiroshima, Akio; Ohtomo, Takeshi; Usui, Tateo

doi:10.1201/b10552-204

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…A change in the thermal state of such structures occurs due to the heat liberation from cement hydration during the concrete hardening process, as well as outside temperature fluctuations, solar exposure, various technological factors, etc. Emerging thermal stresses may cause damage to the structural integrity [15][16][17][18][19][20][21][22][23][24][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

Korotchenko

Ivanov

Semenov

et al. 2016

MATEC Web of Conferences

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Abstract. The article deals with issues of the thermal cracking resistance in massive concrete and reinforced concrete structures during the building period. The paper gives the calculation results of thermal stressed state in massive foundation slabs with different time organization of the thermal protection. It was found that the thermal crack resistance is fully guaranteed when the insulation is installed immediately after concrete has been placed or it has been placed with short delay. The delay can be allowed if the relative tensile strain of the concrete does not exceed the tensility limit. The acceptable delay ranges from 8 to 30% of time it takes to reach the maximum temperature in the concrete block. The surface insulation installation at the time of the temperature peak inevitably leads to the formation and development of cracks.

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Section: Introductionmentioning

confidence: 99%

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

Korotchenko

Ivanov

Semenov

et al. 2016

MATEC Web of Conferences

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Effects of Gypsum and Limestone Powder on Fresh Properties and Compressive Strength of Concrete Containing Ground Granulated Blast Furnace Slag under Different Curing Temperatures

Gyabaah

Miyazawa

Nito³

2022

Construction Materials

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Usage of industrial by-products such as ground granulated blast furnace slag (GGBFS), gypsum, and limestone powder have gained prominence in concrete production. It is, therefore, very important to conduct research into the various materials and their attendant influence on properties of concrete at different ambient temperatures. This study focused on the slump, setting time, and compressive strength of concrete with GGBFS at a constant replacement ratio, in which different forms of gypsum, namely anhydrous and di-hydrate gypsum, were also added at different SO3 contents. Effect of addition of limestone powder was also investigated. The results of the tests indicated that both gypsum and limestone powder when added to a mix proportion containing GGBFS can improve slump and compressive strength of concrete. Anhydrous gypsum produced higher optimum compressive strength as compared with di-hydrate gypsum. An increase in SO3 content from gypsum contributed to strength development at early ages but reduced its long-term strength. Gypsum added to the mix delayed initial and final setting time. Limestone powder accelerated both initial and final setting times and contributed to increasing compressive strength after one day, thus three to seven days; however, the long-term strength was reduced. Curing temperature of concrete influenced strength development and the time required to remove formwork was determined for different mixtures using “maturity function”.

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Thermal Cracking Resistance in Massive Concrete Structures in the Winter Building Period

Semenov

Barabanshchikov

2015

AMM

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The article deals with issues of the thermal cracking resistance in massive concrete and reinforced concrete structures during the building period. The paper lists the calculation results of the NPP reactor foundation mat thermal stressed state and thermal cracking resistance. The research also considers the concrete hardening temperature influence on its thermo-physical and deformation characteristics. The deformation criterion is used to calculate the concrete thermal cracking resistance. In addition, the paper focuses on the assignment of safe concrete pouring technological parameters in the winter period. Furthermore, the article estimates the necessity of the structure peripheral electric heating during the building period.

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Control of thermal cracking in mass concrete with blast-furnace slag cement

Cited by 3 publications

References 2 publications

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

Thermal Stressed State in Massive Concrete Structures in the Winter Building Period

Effects of Gypsum and Limestone Powder on Fresh Properties and Compressive Strength of Concrete Containing Ground Granulated Blast Furnace Slag under Different Curing Temperatures

Thermal Cracking Resistance in Massive Concrete Structures in the Winter Building Period

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