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https://doaj.org/article/0d60c...
Article . 2019
Data sources: DOAJ
https://dx.doi.org/10.18720/mc...
Other literature type . 2019
Data sources: Datacite
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Method of proportioning the cement-water ratio of steam-cured concrete

Метод расчета цементно-водного отношения пропариваемого бетона
Authors: Dvorkin, Leonid; Zhitkovsky, Vadim;

Method of proportioning the cement-water ratio of steam-cured concrete

Abstract

The article presents the results of experimental studies that made it possible to substantiate the calculated dependences of the steam-cured concrete strength and the required values of the cement-water ratio (C/W) to ensure the specified strength values. For this purpose, dependences are obtained that are valid when using Portland cement and slag Portland cement, as well as a change in the wide range of regime parameters of heat treatment: temperature and duration of curing. To calculate the required values of C/W, a formula is justified, which allows determining the strength of cement under steaming when the temperature changes in the range of 60...95 С and the duration of isothermal heating during steaming from 4 to 18 hours. To calculate the strength of cement during steaming, the coefficients are recommended, which allow taking into account the content of aluminates and mineral additives in cement. Taking into account the calculated dependencies, an algorithm is proposed for calculating the C/W of steam-cured concrete and an example of its implementation.

В статье приведены результаты экспериментальных исследований, позволившие обосновать расчетные зависимости прочности пропаренного бетона и необходимых значений цементно-водного отношения (Ц/В) для обеспечения заданных значений прочности. С этой целью получены зависимости, справедливые при применении портландцемента и шлакопортландцемента, а также изменении в широком диапазоне режимных параметров тепловой обработки: температуры и длительности последующего тведения. Для расчетов необходимых значений Ц/В обоснована формула, позволяющая определить активность цемента в условиях пропаривания при изменении температуры в диапазоне 60…95 С и длительности изотермического прогрева при пропаривании от 4 до 18 часов. Для расчета активности цемента рекомендованы для условий пропаривания также коэффициенты, позволяющие учитывать алюминатность цемента, вид и содержание в цементе минеральных добавок. С учетом полученных расчетных зависимостей предложен алгоритм для расчета Ц/В пропаренных бетонов и пример его реализации.

Keywords

прочность, Building construction, hardening, modes, temperature, Engineering (General). Civil engineering (General), температура, твердение, cement-water ratio, цементно-водное отношение, пропаривание, TA1-2040, strength, режимы, TH1-9745, steam-curing

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average