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Updated: Apr 20, 2026

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Method for evaluating the heat-island mitigation effect of porous/water-retentive blocks using a climatic chamber

Dae Uk Shin1, Woo Bin Bae1, Yun Mi Park1

  • 1Center for Climatic Environment Real-scale Testing, Korea Conformity Laboratories Deoksan-myeon, Jincheon-gun, Chungcheongbuk-do, 27872, Republic of Korea

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|November 21, 2019
PubMed

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In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
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In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
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Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
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