Results 1 to 10 of about 146,363 (308)

Mechanisms of hydration heat inhibitors on the early heat release process of cement

open access: yesFrontiers in Materials, 2022
We evaluated the effects of hydration heat inhibitors on the early hydration heat release process of cement and its main mineral components. We used a microcalorimetric method to determine the effects of various proportions and properties of hydration ...
Jiaoyang Lv, Bo Tian, Lihui Li, Lei Quan
doaj   +1 more source

The Relationship Between Heat Stress and Physical Workload with Worker's Hydration Status in Tirtonadi Bus Station Surakarta [PDF]

open access: yesE3S Web of Conferences, 2020
Terminal workers work with physical load activities every day and are in a hot work climate, which has the potential to experience status disturbances, potentially resulting in hydration problems.
Suryadi Iwan   +4 more
doaj   +1 more source

Influence and Mechanism Research of Hydration Heat Inhibitor on Low-Heat Portland Cement

open access: yesFrontiers in Materials, 2021
A kind of microcapsule sustained-release–type hydration heat inhibitor (MSR) was prepared. The effect of MSR on semi-adiabatic temperature rise, setting time, and strength of low-heat Portland cement was investigated.
Fujie Jia   +4 more
doaj   +1 more source

Influence of Zinc-Saturated Zeolite on Portland Cement Hydration Kinetics

open access: yesAdvances in Materials Science and Engineering, 2022
This work examines the influence of zeolite saturated with zinc (SZ) on the early hydration of Portland cement. The measurements and results indicate that the microcalorimetric method allows continuous observation and determination of SZ’s influence on ...
Damir Barbir, Pero Dabic
doaj   +1 more source

Impact factors of hydration heat of cemented tailings backfill based on multi-index optimization

open access: yesCase Studies in Thermal Engineering, 2020
In order to obtain the impact factors of hydration heat of cemented tailings backfill, different evaluation indexes were selected and analyzed. The results showed that the hydration of cement was violent in the early stage of reaction.
Dingyi Wei   +3 more
doaj   +1 more source

Effects of chlorides on setting time, hydration heat and hydration products of fresh slurry of cemented paste backfill

open access: yesCase Studies in Construction Materials, 2022
Mine water is rich in various chlorides, which will inevitably affect the performance of the cemented paste backfill (CPB). In this study, the TAM Air isothermal calorimeter was used, the effects of typical chlorides (NaCl, CaCl2 and MgCl2) in mine water
Shenyang Ouyang   +8 more
doaj   +1 more source

Heat of hydration in clays stabilized by a high-alumina steel furnace slag

open access: yesCleaner Materials, 2022
This investigation utilized isothermal calorimetry (IC) to quantify the heat of hydration of steel furnace slag (SFS)-stabilized clays to assess the chemical aspects of the stabilization. Specifically, kaolin and bentonite clays were each blended with 40%
Thien Q. Tran   +2 more
doaj   +1 more source

Climate change and the kidney [PDF]

open access: yes, 2019
The worldwide increase in temperature has resulted in a marked increase in heat waves (heat extremes) that carries a markedly increased risk for morbidity and mortality.
Butler-Dawson, Jaime   +12 more
core   +1 more source

Effect of Citric Acid-Modified Chitosan on Hydration Regulation and Mechanism of Composite Cementitious Material System

open access: yesBuildings, 2023
The temperature stress caused by the large temperature difference is the main factor causing harmful cracks in large-volume concrete. The introduction of admixtures is beneficial to reduce the temperature difference inside and outside the large-volume ...
Liguo Wang   +8 more
doaj   +1 more source

Effectiveness of short-term heat acclimation on intermittent exercise in thermoneutral and hot environments [PDF]

open access: yes, 2015
It is well-established that repetition of heat stress exposure has been shown to facilitate adaptations to the heat but these protocols have tended to be of a fixed work intensity, continuous exercise, long-term in duration (>7 days) and use hydration ...
Abt, Grant   +7 more
core   +2 more sources

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