Strength, Toughness: Mineral Wool‐Polyethylene Pulp‐Reinforced MortarsSource: Journal of Materials in Civil Engineering:;1991:;Volume ( 003 ):;issue: 004Author: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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contributor author | Robert Nicholls | |
date accessioned | 2017-05-08T21:16:39Z | |
date available | 2017-05-08T21:16:39Z | |
date copyright | November 1991 | |
date issued | 1991 | |
identifier other | %28asce%290899-1561%281991%293%3A4%28320%29.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/45270 | |
description 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. | |
publisher | American Society of Civil Engineers | |
title | Strength, Toughness: Mineral Wool‐Polyethylene Pulp‐Reinforced Mortars | |
type | Journal Paper | |
journal volume | 3 | |
journal issue | 4 | |
journal title | Journal of Materials in Civil Engineering | |
identifier doi | 10.1061/(ASCE)0899-1561(1991)3:4(320) | |
tree | Journal of Materials in Civil Engineering:;1991:;Volume ( 003 ):;issue: 004 | |
contenttype | Fulltext |