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  2. Efflorescence - Wikipedia

    en.wikipedia.org/wiki/Efflorescence

    In chemistry, efflorescence (which roughly means "the flowering" in French) is the migration of a salt to the surface of a porous material, where it forms a coating. The essential process involves the dissolving of an internally held salt in water or occasionally, in another solvent.

  3. Basement waterproofing - Wikipedia

    en.wikipedia.org/wiki/Basement_waterproofing

    Efflorescence: White, powdery residue found on basement walls near the floor. Mold : Fungi that usually grow in damp, dark areas and can cause respiratory problems after prolonged exposure. Foundation crack injections

  4. Soil salinity control - Wikipedia

    en.wikipedia.org/wiki/Soil_salinity_control

    This damage is an average of 2,000 hectares of irrigated land in arid and semi-arid areas daily for more than 20 years across 75 countries (each week the world loses an area larger than Manhattan)...To feed the world's anticipated nine billion people by 2050, and with little new productive land available, it's a case of all lands needed on deck.—principal author Manzoor Qadir, Assistant ...

  5. Stone sealer - Wikipedia

    en.wikipedia.org/wiki/Stone_sealer

    Efflorescence is usually the result of mineral solutions in the capillary channels being drawn to the surface. If the water evaporates, the minerals remain as the so-called efflorescence. It also can be the result of chemical reaction; if badly prepared cement-based mortar is applied to maintain the stone in position, free calcium hydroxide may ...

  6. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    Example of secondary efflorescence in parking garage exposed to diluted road salt from vehicles entering the garage during winter. When water flows through cracks present in concrete, water may dissolve various minerals present in the hardened cement paste or in the aggregates, if the solution is unsaturated with respect to them.

  7. Composting in Winter: 10 Simple Tips for Keeping Your ... - AOL

    www.aol.com/composting-winter-10-simple-tips...

    Gardeners often assume outdoor compost piles stop working in cold weather, but beneficial microbes can continue to break down compost all winter. The problem is that composting takes much longer ...

  8. Today’s NYT ‘Strands’ Hints, Spangram and Answers for Friday ...

    www.aol.com/today-nyt-strands-hints-spangram...

    Related: 16 Games Like Wordle To Give You Your Word Game Fix More Than Once Every 24 Hours. How To Play Strands. How to play the NYT Strands gameThe New York Times.

  9. Sulfate attack in concrete and mortar - Wikipedia

    en.wikipedia.org/wiki/Sulfate_attack_in_concrete...

    Cement hydration and strength development mainly depend on two silicate phases: tricalcium silicate (C 3 S) (), and dicalcium silicate (C 2 S) (). [1] Upon hydration, the main reaction products are calcium silicate hydrates (C-S-H) and calcium hydroxide Ca(OH) 2, written as CH in the cement chemist notation.

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