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  2. How Much Does It Cost to Replace a Water Heater? - AOL

    www.aol.com/much-does-cost-replace-water...

    Permits for a hot water heater replacement usually cost between $25 and $300, depending on the extent of the work and your local laws. Permits for connecting your home to natural gas before the ...

  3. Ready-mix concrete - Wikipedia

    en.wikipedia.org/wiki/Ready-mix_concrete

    For a small to medium project, the cost and time of hiring mixing equipment, labour, plus purchase and storage for the ingredients of concrete, added to environmental concerns (cement dust is an airborne health hazard) [10] may simply be not worthwhile when compared to the cost of ready-mixed concrete, where the customer pays for what they use ...

  4. CalPortland Company - Wikipedia

    en.wikipedia.org/wiki/CalPortland_Company

    A third cement plant, in Mojave, California, began production in 1956. [4] In 1960, California Portland Cement reported net income of $7.3 million ($75.2 million in 2023). The following year, it formed a new subsidiary in Phoenix, Arizona Sand & Rock Company, to manufacture prestressed and ready-mixed concrete.

  5. Own a pool in Southern California? New air-quality rule ...

    www.aol.com/news/own-pool-southern-california...

    The rule will lead to the replacement over three decades of more than 1 million gas-burning appliances — including an estimated 700,000 pool heaters and 300,000 tankless water heaters — with ...

  6. Portland cement - Wikipedia

    en.wikipedia.org/wiki/Portland_cement

    When water is mixed with portland cement, the product sets in a few hours and hardens over a period of weeks. These processes can vary widely, depending upon the mix used and the conditions of curing of the product, [ 18 ] but a typical concrete sets in about 6 hours and develops a compressive strength of 8 MPa in 24 hours.

  7. Cement industry in the United States - Wikipedia

    en.wikipedia.org/wiki/Cement_industry_in_the...

    In 2013, 70.8 percent of portland cement was sold as ready-mix concrete, such as is delivered in cement-mixer trucks. 11.5 percent was sold dry to contractors and construction materials stores; 11.3 percent was sold to manufacturers of concrete products; 4.6 percent was sold for oil and gas wells, and 1.8 percent was sold to government agencies ...

  8. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    Direct electric resistance tank water heaters are not included in the Energy Star program; however, the Energy Star program does include electric heat pump units with energy factors of 200% or higher. Tankless gas water heaters (as of 2015) must have an energy factor of 90% or higher for Energy Star qualification.

  9. Making cement is very damaging for the climate. One solution ...

    www.aol.com/news/making-cement-very-damaging...

    Cement makes up 10-15% of concrete by volume, but accounts for 88% of concrete’s considerable emissions. Other ingredients in concrete are sand, gravel, crushed stone and water.

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