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|Title: ||An evaluation of repair mortars installed by worm-pump spraying|
|Authors: ||Goodier, Chris I.|
Austin, Simon A.
Robins, Peter J.
|Issue Date: ||2001|
|Publisher: ||© A.A. Balkema|
|Citation: ||GOODIER, C.I., AUSTIN, S.A. and ROBINS, P.J., 2001. An evaluation of repair mortars installed by worm-pump spraying. IN: Bernard, E.S. (ed.). Shotcrete: engineering developments: proceedings of the International Conference on Engineering Developments in Shotcrete, Hobart, Tasmania, Australia, 2-4 April 2001. Lisse, Netherlands ; Exton, PA : A.A. Balkema, pp.103-110|
|Abstract: ||This paper examines the fresh and hardened performance of wet-process sprayed mortars and
the influence of rheology on the pumping and spraying of these mortars. Seven commercially available preblended
repair mortars designed for hand application, together with a laboratory-designed fine mortar, were
investigated using the Tattersall two-point rotational viscometer, the pressure bleed test, the slump test, and a
vane shear strength test. The mortars were pumped and sprayed with a small diameter worm pump and the
build thickness determined. Hardened properties measured include compressive strength, tensile bond
strength, hardened density and drying shrinkage. Tests were conducted on cast and in-situ specimens and,
where possible, on specimens produced by spraying directly into a cube or beam mould. Initial findings for
predicting the pumpability and sprayability of the mortars are presented and this is linked together with the
hardened performance. These results show that the majority of proprietary pre-blended repair mortars designed
for hand application are suitable for wet-process application with a worm pump.|
|Description: ||This conference paper was published in "Shotcrete: engineering developments: proceedings of the International Conference on Engineering Developments in Shotcrete." These proceedings are available from: http://www.taylorandfrancis.com/|
|Version: ||Accepted for publication|
|Appears in Collections:||Conference Papers (Architecture, Building and Civil Engineering)|
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