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  2. Limestone pavement - Wikipedia

    en.wikipedia.org/wiki/Limestone_pavement

    A limestone pavement is a natural karst landform consisting of a flat, incised surface of exposed limestone that resembles an artificial pavement. [1] The term is mainly used in the UK and Ireland, where many of these landforms have developed distinctive surface patterning resembling paving blocks. [ 2 ]

  3. List of quarries in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_quarries_in_the...

    Marengo warehouse, in Marengo, Indiana, formerly a limestone quarry, now one of the largest subterranean storage facilities in the nation, with nearly 4,000,000 square feet (370,000 m 2) space. It began as an open pit quarry in 1886 due in part to its proximity to a railroad. Underground room and pillar mining began in 1936. Leased storage ...

  4. Lime mortar - Wikipedia

    en.wikipedia.org/wiki/Lime_mortar

    There are three strength grades for natural hydraulic lime, laid down in the European Norm EN459; NHL2, NHL3.5 and NHL5. The numbers stand for the minimum compressive strength at 28 days in newtons per square millimeter (N/mm 2). For example, the NHL 3.5 strength ranges from 3.5 N/mm 2 (510 psi) to 10 N/mm 2 (1,450 psi). [16]

  5. Permeable paving - Wikipedia

    en.wikipedia.org/wiki/Permeable_paving

    Permeable paving demonstration Stone paving in Santarém, Portugal. Permeable paving surfaces are made of either a porous material that enables stormwater to flow through it or nonporous blocks spaced so that water can flow between the gaps. Permeable paving can also include a variety of surfacing techniques for roads, parking lots, and ...

  6. Road surface - Wikipedia

    en.wikipedia.org/wiki/Road_surface

    A road surface (British English) or pavement (North American English) is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway. In the past, gravel road surfaces, macadam , hoggin , cobblestone and granite setts were extensively used, but these have mostly been replaced by ...

  7. Pavers (flooring) - Wikipedia

    en.wikipedia.org/wiki/Pavers_(flooring)

    The concrete paving bricks are a porous form of brick formed by mixing small stone hardcore, dyes, cement and sand and other materials in various amounts. Many block paving manufacturing methods are now allowing the use of recycled materials in the construction of the paving bricks, such as crushed glass and crushed old building rubble.