00464515

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http://onlinepubs.trb.org...trr/1987/1110/1110-005.pdf

https://scholar.google.co...dran&publication_year=1987

Presented in this paper are the effects of temperature on the early age properties of two rapid-hardening magnesium phosphate-based cements and their combinations, as follows: (a) magnesium phosphate cement for cold and regular weather use; (b) magnesium phosphate cement for hot weather use; (c) a 50-50 blend of magnesium phosphate cement and magnesium phosphate cement for hot weather use; and (d) magnesium phosphate cement with the addition of borax. A combination of both mechanical (setting and compressive strength) and physicochemical (X-ray diffraction; optical microscopy and infrared spectroscopy) tests was performed. Overall, 35 mixes were made, cured under various temperature conditions, and tested. The strengths were determined at the ages of 1, 3, and 24 hr. Freeze-thaw experiment was left for future work. The tests revealed that all the above cements develop almost 2,000 psi (14 MPa) compressive strength within an hour regardless of various curing conditions; the 28 days' strengths are more than 4,500 psi (31 MPa); and the 90 days' strengths are more than 6,500 psi (45 MPa) under normal curing conditions. Thus, their applicability for rapid road repair and other concrete repair works seems promising. Further, the MPH cement appears to have the best mechanical properties among them all under the majority of weather conditions.

Publication of this paper sponsored by Committee on Mechanical Properties of Concrete. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01492602

pp 34-45

1987

Transportation Research Record

66th Annual Meeting of the Transportation Board

030904460X

Print

Figures (8) ; References (2) ; Tables (11)

Cement; Compression tests; Concrete; Diffraction; Infrared spectroscopy; Inorganic phosphates; Magnesium compounds; Mechanical properties; Microscopy; Physicochemical properties; Repairing; Setting (Concrete); Strength of materials; Temperature; Weather; X rays

Borax; Concrete strength; Magnesium phosphate; Optical microscopy; Setting time; X-ray diffraction

Highways; Materials; I32: Concrete

TRIS, TRB

Dec 31 1987 12:00AM

• A NEW PROCESS FOR THE LAYING OF MONOLITHIC COMPOSITE CONTINUOUSLY REINFORCED CONCRETE PAVEMENTS
• COMPARISON OF CONCRETE PAVEMENT REHABILITATION TECHNIQUES IN OHIO DEMONSTRATION PROGRAM
• CONSTRUCTION OF A THIN-BONDED PORTLAND CEMENT CONCRETE OVERLAY IN SOUTH DAKOTA
• DRAINCRETE IN PAVEMENT REHABILITATION
• EARLY STRENGTH OF CONCRETE PATCHING MATERIALS AT LOW TEMPERATURES
• FIELD EVALUATION OF CONCRETE PAVEMENT CONSOLIDATION
• FIELD EVALUATION OF DOWEL PLACEMENT IN CONCRETE PAVEMENTS
• FIELD PERFORMANCE OF BONDED CONCRETE OVERLAYS
• MOISTURE RETENTION TESTS AND AGITATION FOR MEMBRANE-FORMING CURING COMPOUNDS FOR PORTLAND CEMENT CONCRETE
• MONTANA'S EXPERIENCE WITH AND STRATEGIES FOR CONCRETE PAVEMENT REHABILITATION
• PERFORMANCE OF STEEL FIBER REINFORCED CONCRETE USING LARGE AGGREGATE
• PETROLOGICAL STUDIES ON CARBONATE AGGREGATE RESPONSIBLE FOR PAVEMENT D-CRACKING IN SOUTHERN MANITOBA, CANADA
• SULFATE IMPURITIES FROM DEICING SALT AND DURABILITY OF PORTLAND CEMENT MORTAR
• THE RELATIONSHIP OF FERROAN DOLOMITE AGGREGATE TO RAPID CONCRETE DETERIORATION