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    Strength, Toughness: Mineral Wool‐Polyethylene Pulp‐Reinforced Mortars

    Source: Journal of Materials in Civil Engineering:;1991:;Volume ( 003 ):;issue: 004
    Author:
    Robert Nicholls
    DOI: 10.1061/(ASCE)0899-1561(1991)3:4(320)
    Publisher: American Society of Civil Engineers
    Abstract: Mortar sheet products can be made stiff and brittle by reinforcing with stiff fibers having strong chemical bonding to cement paste, such as asbestos. They can be made tough and pliable by reinforcing with softer fibers having poor bonding to cement, such as polypropylene, where the fiber stress is transferred over longer distances from developing cracks. It is also known that the stiffness and fracture energy of mortar can be altered by surface treatments of the fiber to either increase its bonding with the paste, making the composite stiffer, or to decrease its bonding, making the composite more pliable. Less understood are the increases in both stiffness and toughness of mortar by reinforcing it with fiber hybrids—one stiff and/or well‐bonded fiber combined with one soft and/or poorly bonded fiber. This study experimentally evaluates the synergism of combining mineral wool to improve stiffness and polyethylene pulp to improve toughness for mortar sheet products. A design example illustrates the determination of fiber weight ratios for specified bending stiffness and bending toughness at minimum material cost.
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      Strength, Toughness: Mineral Wool‐Polyethylene Pulp‐Reinforced Mortars

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    contributor authorRobert Nicholls
    date accessioned2017-05-08T21:16:39Z
    date available2017-05-08T21:16:39Z
    date copyrightNovember 1991
    date issued1991
    identifier other%28asce%290899-1561%281991%293%3A4%28320%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/45270
    description abstractMortar sheet products can be made stiff and brittle by reinforcing with stiff fibers having strong chemical bonding to cement paste, such as asbestos. They can be made tough and pliable by reinforcing with softer fibers having poor bonding to cement, such as polypropylene, where the fiber stress is transferred over longer distances from developing cracks. It is also known that the stiffness and fracture energy of mortar can be altered by surface treatments of the fiber to either increase its bonding with the paste, making the composite stiffer, or to decrease its bonding, making the composite more pliable. Less understood are the increases in both stiffness and toughness of mortar by reinforcing it with fiber hybrids—one stiff and/or well‐bonded fiber combined with one soft and/or poorly bonded fiber. This study experimentally evaluates the synergism of combining mineral wool to improve stiffness and polyethylene pulp to improve toughness for mortar sheet products. A design example illustrates the determination of fiber weight ratios for specified bending stiffness and bending toughness at minimum material cost.
    publisherAmerican Society of Civil Engineers
    titleStrength, Toughness: Mineral Wool‐Polyethylene Pulp‐Reinforced Mortars
    typeJournal Paper
    journal volume3
    journal issue4
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)0899-1561(1991)3:4(320)
    treeJournal of Materials in Civil Engineering:;1991:;Volume ( 003 ):;issue: 004
    contenttypeFulltext
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