Early Age Shrinkage Crack Distribution in Concrete Plates Reinforced with Different Steel Fibre Types

2020 ◽  
pp. 24-34
Author(s):  
Sébastien Wolf ◽  
Simon Cleven ◽  
Oldrich Vlasák
Keyword(s):  
Steel Fibre ◽  
Fibre Types ◽  
Early Age ◽  
Shrinkage Crack ◽  
Crack Distribution ◽  
Concrete Plates

Shrinkage crack inhibiting of cast in situ tunnel concrete by double regulation on temperature and deformation of concrete at early age

2020 ◽  
Vol 240 ◽  
pp. 117834 ◽  
Author(s):  
Ming Li ◽  
Wen Xu ◽  
Yujiang Wang ◽  
Qian Tian ◽  
Jiaping Liu
Keyword(s):  
Early Age ◽  
Shrinkage Crack

Effect of Steel and Alkaline-Resistance Glass Fibre on Mechanical and Durability Properties of Lightweight Foamed Concrete

2012 ◽  
Vol 626 ◽  
pp. 404-410 ◽  
Author(s):  
Muhammad Hafiz Ahmad ◽  
Hanizam Awang
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Water Absorption ◽  
Glass Fibre ◽  
Steel Fibre ◽  
Drying Shrinkage ◽  
Early Age ◽  
Durability Properties ◽  
Alkaline Resistance ◽  
Foamed Concrete

This paper investigates the effect of steel fibre and alkaline-resistance glass fibre lightweight foamed concrete with fly ash inclusion towards mechanical and durability properties. The lightweight foamed concrete (LFC) with a density of 1000 kg/m3with constant water sand ratio of 1: 1:5 and water cement ratio of 0.45 was cast and tested. Steel and alkaline-resistance glass fibres were used as additives and 30% of cement was replaced by fly ash. Detail experiments were setup to study the behaviour and reaction of additives which is expected to give different results on mechanical and durability properties of LFC. Compared to AR-glass fibre, steel fibre has greater contribution in terms of mechanical properties. SFLFC resulted as the most effective approach for compressive, flexural, tensile split and water absorption with strength 6.13 N/mm2, 1.96 N/mm2, 1.52 N/mm2and lowest water absorption at 6.5% respectively. On the other hand, AR-glass fibre is better in controlling drying shrinkage which leads to controlling the cracking at early age. Fly ash does not change the mechanical properties and durability due to unprocessed stage to its finer forms.

A Community Based High Risk Register for Hearing Loss

1982 ◽  
Vol 47 (4) ◽  
pp. 373-375 ◽  
Author(s):  
James L. Fitch ◽  
Thomas F. Williams ◽  
Josephine E. Etienne
Keyword(s):  
Hearing Loss ◽  
System Identification ◽  
High Risk ◽  
Language Learning ◽  
Education Program ◽  
Communication System ◽  
Auditory Signal ◽  
Early Age ◽  
Community Based ◽  
Children With Hearing Loss

The critical need to identify children with hearing loss and provide treatment at the earliest possible age has become increasingly apparent in recent years (Northern & Downs, 1978). Reduction of the auditory signal during the critical language-learning period can severely limit the child's potential for developing a complete, effective communication system. Identification and treatment of children having handicapping conditions at an early age has gained impetus through the Handicapped Children's Early Education Program (HCEEP) projects funded by the Bureau of Education for the Handicapped (BEH).

The Physician’s Task and the Problem of Documentation

1964 ◽  
Vol 03 (01) ◽  
pp. 11-19 ◽  
Author(s):  
A. Proppe
Keyword(s):  
Statistical Evaluation ◽  
Age Groups ◽  
Diagnostic Methods ◽  
Early Age ◽  
Case Histories ◽  
Lupus Vulgaris ◽  
Pathological Conditions ◽  
Clinical Methods ◽  
Corpus Hippocraticum ◽  
High Degree

SummaryCase histories suitable for statistical evaluation can be found even as far back as in the Corpus Hippocraticum. Such simple data as the patient’s age, body weight, size, the date of menarche, etc. are practically always included in the case records, and it is demonstrated that, when such data are recorded in a system of documentation suitable for mechanical sorting, it may enable us to draw conclusions of very great importance. Mechanical registration methods have revealed that, in the determination and recording of data as hitherto carried out. there has been a surprisingly large number of errors and a high degree of unreliability. This view has a considerable influence on modern clinical methods; it renders a more democratic relation between physician and patient necessary and makes clear the need for measures to enhance the reliability of diagnosis and treatment of pathological conditions. The author illustrates this view with reference to the mechanical falsification of the thesis of the proneness of early age groups to lupus vulgaris, furthermore with reference to the mechanical rationalization of modern routine diagnostic methods, to the constant surveillance of adverse effects on public health and to the protection against allergic reactions with the aid of recording systems of personal allergy and intolerance data with mechanical sorting and computer techniques.

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