Influence of sulfur trioxide in clinker on the hydration heat and physical properties of Portland cement

Yamashita, Makio; Harada, Takeo; Sakai, Etsuo; Tsuchiya, Koichi

doi:10.1016/j.conbuildmat.2020.118844

Cited by 11 publications

(5 citation statements)

References 29 publications

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“…The corresponding temperature for microwave cured CEM II mortar is 55.4 °C at 90 minutes (1.5 h) after casting. This is a significant result which indicates that even a short period of microwave heating at early age can have a similar effect as a much longer period of continuous heating [44] on the peak heat of hydration and the time it occurs.…”

Section: Internal Temperature Development During 24 Hours After Microwave Curingmentioning

confidence: 91%

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Hydration and Microwave Curing Temperature Interactions of Repair Mortars

Mangat¹,

Abubakri²,

Grigoriadis³

et al. 2021

RPM

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Microwave curing of repair patches provides an energy efficient technique for rapid concrete repair. It has serious economic potential due to time and energy saving especially for repairs in cold weather which can cause work stoppages. However, the high temperatures resulting from the combination of microwave exposure and accelerated hydration of cementitious repair materials need to be investigated to prevent potential durability problems in concrete patch repairs. This paper investigates the time and magnitude of the peak hydration temperature during microwave curing (MC) of six cement based concrete repair materials and a CEM II mortar. Repair material specimens were microwave cured to a surface temperature of 40-45 °C while their internal and surface temperatures were monitored. Their internal temperature was further monitored up to 24 hours in order to determine the effect of microwave curing on the heat of hydration. The results show that a short period of early age microwave curing increases the hydration temperature and brings forward the peak heat of hydration time relative to the control specimens which are continuously exposed to ambient conditions (20 °C, 60% RH). The peak heat of hydration of normal density, rapid hardening Portland cement based repair materials with either pfa or polymer addition almost merges with the end of microwave curing period. Similarly, lightweight polymer modified repair materials also develop heat of hydration rapidly which almost merges with the end of microwave curing period. The peak heat of hydration of normal density ordinary Portland cement based repair materials, with and without polymer addition, occurs during the post microwave curing period. The sum of the microwave curing and heat of hydration temperatures can easily exceed the limit of about 70 °C in some materials at very early age, which can cause durability problems.

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Section: Internal Temperature Development During 24 Hours After Microwave Curingmentioning

confidence: 91%

“…Material 6 is based on rapid setting, rapid hardening Portland cement which emits more heat during the initial setting time of about 30 minutes. The accelerated heat of hydration under microwave curing of material 4 may be caused by its relatively high SO3 and Al2O3 content [44].…”

Section: Internal Temperature Development During 24 Hours After Microwave Curingmentioning

confidence: 99%

Hydration and Microwave Curing Temperature Interactions of Repair Mortars

Mangat¹,

Abubakri²,

Grigoriadis³

et al. 2021

RPM

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show abstract

“…The remaining percentage of cement formation is usually done with granulated blast furnace slag, which determines the production yield and can achieve a higher ecological benefit by using a lower percentage of clinker, thus achieving lower CO 2 emissions and lowering the costs of energy generation for cement production. Maintaining at all times the strength requirements of the concrete [ 42 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

Actions to reduce carbon footprint in materials to healthcare buildings

Carrasco-Amador

Canito-Lobo

Castaño-Liberal

et al. 2022

Heliyon

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“…4. Yamashita et al [58] have observed that increasing the clinker SO 3 content also accelerated the alite reaction but why it accelerates the reaction is still not known. Quennoz and Scrivener [8] proposed that the enhancement in C 3 S hydration by gypsum is due to reactions between the sulfates and the aluminum present in C 3 S structure, thus forming ettringite.…”

Section: Effect Of Calcium Sulfate On C 3 S Hydrationmentioning

confidence: 99%