1887

n Journal of the South African Institution of Civil Engineers - The influence of compaction moisture on shrinkage in stabilized materials : technical paper

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Abstract

The use of cementitiously stabilized materials in road pavements normally results in cracks forming in the layer, which eventually reflect through the surface of the pavement. This is unsightly and aids in the ingress of water in the pavement, which generally leads to softening of the pavement materials, with increased likelihood of overstressing of the other layers and accelerated pavement distress. Previous studies have been carried out on fine graded materials with high clay contents stabilized with high percentages of cement. The materials used in the upper layers of the South African pavements are generally more gravelly with relatively low clay contents. The aim of this study was to develop a test method whereby shrinkage can be measured on specimens prepared with coarsely graded stabilized gravels and an investigation was carried out on the influence of compaction moisture on the shrinkage of this type of material.

Die gebruik van sementgestabiliseerde materiale in padplaveisels het gewoonlik tot gevolg dat krake in die gestabiliseerde laag ontstaan wat uiteindelik reflekteer na die oppervlak van die plaveisel. Hierdie krake is onooglik en bring mee dat vog die plaveisellae binnedring, wat die plaveiselmateriale verswak en wat op sy beurt weer die waarskynlikheid van oorspanning van die ander plaveisellae en versnelde plaveiselagteruitgang tot gevolg het. Vorige studies is gedoen op fyn gegradeerde materiale met 'n hoe versentasie sement. Die materiale wat egter in die boonste plaveisellae van die Suid-Afrikaanse plaveisels gebruik word, is oor die algemeen meer gruisagtig met 'n relatief lae klei-inhoud. Die doel van hierdie studie was om 'n toetsmetode te ontwikkel waarmee krimping gemeet kan word op monsters wat voorberei is met grof gegradeerde gestabiliseerde gruis en 'n ondersoek is gedoen na die invloed van kompaksievog op die krimping van hierdie tipe materiaal.

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/content/civileng1/38/3/EJC26789
1996-01-01
2016-12-09
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