Simplified Description of Creep Surface for a Portland Cement Mortar

Autor:	Leonard G. Tulin
Rok vydání:	1968
Předmět:	Materials science business.industry General Engineering Structural engineering Compression (physics) USable Viscoelasticity law.invention Portland cement Compressive strength Creep Rheology law Mortar Composite material business
Zdroj:	ACI Journal Proceedings. 65
ISSN:	0002-8061
DOI:	10.14359/7486
Popis:	THIS STUDY ANALYZES CREEP OF PLAIN PORTLAND CEMENT MORTAR UNDER UNIFORM COMPRESSIVE STRESS FROM A PHENOMENOLOGICAL VIEWPOINT WITH THE OBJECTIVE OF OBTAINING AN ALTERNATE FORM OF THE STRAIN-STRESS-TIME RELATIONSHIP TO THAT OBTAINED FROM VISCO-ELASTIC ANALYSIS. THE AIM IS TO OBTAIN RELATIONSHIPS WHICH ARE MORE USABLE THAN THE EXPRESSIONS OBTAINED FROM THE ANALYSIS OF THE RHEOLOGICAL MODELS. THE TECHNIQUES OF DIMENSIONAL ANALYSIS ARE USED TO ORGANIZE AN EXPERIMENTAL PROGRAM AND TO DETERMINE THE FORM OF THE EXPRESSION DESCRIBING THE STRAIN-STRESS-TIME SURFACE. A SUITABLE LEAST SQUARES METHOD IS USED IN THE NUMERICAL EVALUATION OF PARAMETERS IN THE EQUATION OF THE SURFACE, AND SOME CONCLUSIONS ARE DRAWN REGARDING THE VALIDITY OF THE RESULTS. A COMPARISON OF THE SIMPLIFIED EQUATION OF THE CREEP SURFACE WITH THE RESULTS OBTAINED FROM VISCO-ELASTIC ANALYSES SHOWS THAT THE ALTERNATE FORM FOR THE SURFACE IS INDEED SIMPLER AND THEREFORE MORE USABLE THAN THE RESULTS OBTAINED FROM THE ANALYSIS OF RHEOLOGICAL MODELS. IN THIS REGARD, THE OBJECTIVE OF THIS INVESTIGATION HAS BEEN MET. /AUTHOR/
Databáze:	OpenAIRE
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