Cracking of open traffic rigid pavement

S Ismadji,S Hasyim,Yudi Siswanto,Widodo Widodo,I Yani,Chatarina Niken,I Iskandar,T.E Agustina,L.N Komariah,Elly Tjahjono

doi:10.1051/matecconf/201710105009

Abstract

The research is done by observing the growth of real structure cracking in Natar, Lampung, Indonesia compared to C. Niken’s et al research and literature study. The rigid pavement was done with open traffic system. There are two main crack types on Natar rigid pavement: cracks cross the road, and cracks spreads on rigid pavement surface. The observation of cracks was analyzed by analyzing material, casting, curing, loading and shrinkage mechanism. The relationship between these analysis and shrinkage mechanism was studied in concrete micro structure. Open traffic make hydration process occur under vibration; therefore, fresh concrete was compressed and tensioned alternately since beginning. High temperature together with compression, cement dissociation, the growth of Ca2+ at very early age leads abnormal swelling. No prevention from outside water movement leads hydration process occur with limited water which caused spreads fine cracks. Limited water improves shrinkage and plastic phase becomes shorter; therefore, rigid pavement can’t accommodate the abnormal swelling and shrinking alternately and creates the spread of cracks. Discontinuing casting the concrete makes both mix under different condition, the first is shrink and the second is swell and creates weak line on the border; so, the cracks appear as cracks across the road.

Highlights

Rigid pavements generally are made from concrete, with or without reinforcement
Vibration by open traffic causes coarse aggregate to move down, and concrete matrix fills in the upper part of rigid pavement, as surface stress becomes larger. b
High temperature at the early hydration process together with compression leads to concrete swelling abnormally. d

Summary

Introduction

Rigid pavements generally are made from concrete, with or without reinforcement. Over the past few years, the reliance has shifted more to rigid pavement because of its low maintenance cost, long service life, and smoother riding surface [1]. Besides its of the advantages, rigid pavement is expensive due to the high cost of concrete and reinforcement. The accumulation of cracks can create deterioration in the concrete; rigid pavement performance is decreased and its service life becomes shorter. These circumstances can change into serious problems because accumulated cracks make the structure unsafe. The faults in every step of producing rigid pavement leads to concrete deterioration, micro cracks and wider cracks

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Conclusion