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Masonry in Cold and Hot Weather Conditions

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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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The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
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Frost Action on Concrete01:27

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Outside in.

David Newnham

    Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
    |January 14, 2017
    PubMed
    Summary

    Tuberculosis (TB) can have devastating psychological impacts, leading to profound emotional distress and potentially impacting overall health outcomes beyond the direct effects of the disease.

    Area of Science:

    • Medical Humanities
    • Psychosomatic Medicine
    • History of Medicine

    Background:

    • Tuberculosis (TB) is a significant infectious disease with a long history.
    • The psychological and emotional toll of chronic illness, particularly in historical contexts, is often under-documented.
    • The impact of losing a cherished skill or passion due to illness can be profound.

    Purpose of the Study:

    • To explore the potential psychosomatic effects of severe illness and disability.
    • To examine the historical narrative of tuberculosis and its broader life consequences.
    • To highlight the importance of mental well-being in the context of physical ailments.

    Main Methods:

    • Analysis of a family anecdote concerning Great Aunt Edie.
    • Qualitative interpretation of the narrative's emotional and psychological dimensions.

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  • Historical context of tuberculosis treatment and patient experience.

    • Main Results:

    • The narrative suggests a causal link between the loss of playing the cello and subsequent emotional devastation.
    • Great Aunt Edie's death is attributed to 'a broken heart' rather than the active tuberculosis infection.
    • This case illustrates the potential for psychological distress to significantly affect mortality.

    Conclusions:

    • Severe emotional distress following life-altering illness can have critical health consequences.
    • The psychosomatic impact of tuberculosis, as suggested by this narrative, warrants further consideration in medical history.
    • Patient narratives offer valuable insights into the holistic experience of disease.