Effects Of Uncracked Joints In Jointed Concrete Pavements  

Oleh:

Beom Jun, Chon ; Woo, Lee Seung

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: KSCE Journal of Civil Engineering vol. 11 no. 3 (May 2007), page 141-144.
Topik: Joint; Jointed Concrete Pavements; Uncracked Joints Opening

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: KK25 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Joints in jointed concrete pavements are artificially designed discountinuities to control the natural cracking with slab movementscaused by changes in temperature and misture conditions. However, considerable portion of joints are not cracked in practice. In this study, joint-uncracking phenomenon are categorized by two patterns, prior mid-slab cracking pattern (Case A) and low tensile-stress pattern (Case B). Prior mid-slab cracking pattern indicates that mid slab cracking occurs before saw cutting at joints and joints remains as uncracked. Low tensile-stress pattern indicates that some portions of joint are cracked and other remains uncracked without mid-slab cracking since tensile stress, developed by sunnase friction and curing, is lower than munimum stress to track at joints. The causes of and frequencies of oint-uncracking are investigated in a number of jointed concrete pavements (JCP) in USA and Korea. The uncracked joints result in longer-concrete-pavement slab than the designed. In this study, the efects of uncracked joints such as the erratic large joint opening and excessive slab stress are explored.

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