An experimental study on the flexural properties of glass fiber reinforced cement

Τίτλος

An experimental study on the flexural properties of glass fiber reinforced cement

Θέμα

Concrete

Construction industry

Δημιουργός

Antoniou, Efrosini

Kouparis, Michalakis

Πηγή

Higher Technical Institute

Το πλήρες κείμενο είναι διαθέσιμο από το Υπουργείο Ενέργειας, Εμπορίου Βιομηχανίας και Τουρισμού.

Εκδότης

Library of Cyprus University of Technology

Ημερομηνία

2001

Δικαιώματα

Απαγορεύεται η δημοσίευση ή αναπαραγωγή, ηλεκτρονική ή άλλη χωρίς τη γραπτή συγκατάθεση του δημιουργού και κάτοχου των πνευματικών δικαιωμάτων.

Μορφή

pdf

Γλώσσα

en

Τύπος

text

Αναγνωριστικό

CED0370

Σύνοψη

Nowadays, the building industry in Cyprus is completely depended on concrete.
One of the most common problems that most constructions have in Cyprus is the early shrinkage of concrete.
Plain concrete composed of sand gravelsl (aggregates) and cement, is a brittle material with a low tensile strength and strain capacities. These abilities of concrete have let to problems such as plastic shrinkage cracking and settlement cracking during the first 24 hours after placement.
This is a big problem, in this beautiful island, since the climate is very dry and expansion and contraction is a common phenomenon. Also, Cyprus being in the
Mediterranean Sea, where the soil in these territories is mostly soft clay, with the variation of temperature, concrete leads to cracking. Another factor that plays an important part to this problem is the fact that fault constructional materials are often used, since there are a
lot of projects in process and there is not enough time for a proper check.In order to overcome these problems, studies of research and testing have been
made during the last thirty years with the use of fiber reinforced cements and concretes
(F.R.C.).
These tests have shown that the addition of fiber glass to plastic concrete
substantially increases the resistance of the concrete to early age plastic shrinkage cracking and cracking in response to vibration at early ages. Also a fiber increases the strain capacity (ability to resist strain without developing visible cracking) of the immature
concrete. This is particularly important since a large amount of the cracking of concrete
occurs during the 24 hours after the concrete has been placed when the concrete is most susceptible to vibration, plastic shrinkage and settlement cracking.
The aim These tests have proved that fiber glass reinforcement (F.R.C.) has such properties
which give applications and solutions to various constructural and architectural difficulties
and problems.
Limitation
In this project it must be taken into account that the bibliography and information of glass fiber reinforced concrete (GFRC) was limited, since glass fiber is a new product and only a few companies, in Cyprus, are acquinted with this product.Moreover, only a few project with the use of fiber glass reinforcement have been
established and what the result will actually be in the next fifty years is not known.
In addition the experimental time for this project in the labs was limited as well.
More samples and tests could have been made in order to have better comparising results. Also the shrinkage elongation test and vebe flow table test comparing plain and fiber glass reinforced concrete was not achieved due to short length of time and not enough materials available.