Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Twenty-Year Report on the Illinois Continuously Reinforced Pavement
In 1947-48 eight experimental CRCP sections with lengths ranging from 3,500- to 4,230-ft. were constructed on U.S. 40 in Illinois. Half the sections were 7-in. uniformly thick and the others were 8-in. all placed directly on a natural pumping-susceptible clay subgrade. An adjacent section of 10-in. reinforced concrete with 100-ft. joint spacings on granular subbase was used as a control and all pavement was subjected to two-way traffic. The pavement has been carefully observed over the years and reported at the HRB in 1947, 1951, and 1959. The observations of transverse crack spacing and width, longitudinal cracking, pumping, length changes, steel stresses, traffic, riding quality and performance show that: (1) Crack frequency is porportional to -- and crack width is inversely proportional to -- the steel percentage. (2) Crack widths and spacings change with age but only slowly after 5 years. (3) No strong differences in performance exist between 7- and 8-in. pavements. (4) Unsightly longitudinal cracking occurred and the transverse steel was inadequate. (5) Construction joints and terminal joints are potential trouble spots. (6) Pumping can occur. (7) Satisfactory performance of the sections with 0.3 percent steel for much longer than the 20-year period is not expected. Overall, the project was very successful and has yielded much information to aid in the design of other pavements of this type. (BPR Abstract)
A Twenty-Year Report on the Illinois Continuously Reinforced Pavement
In 1947-48 eight experimental CRCP sections with lengths ranging from 3,500- to 4,230-ft. were constructed on U.S. 40 in Illinois. Half the sections were 7-in. uniformly thick and the others were 8-in. all placed directly on a natural pumping-susceptible clay subgrade. An adjacent section of 10-in. reinforced concrete with 100-ft. joint spacings on granular subbase was used as a control and all pavement was subjected to two-way traffic. The pavement has been carefully observed over the years and reported at the HRB in 1947, 1951, and 1959. The observations of transverse crack spacing and width, longitudinal cracking, pumping, length changes, steel stresses, traffic, riding quality and performance show that: (1) Crack frequency is porportional to -- and crack width is inversely proportional to -- the steel percentage. (2) Crack widths and spacings change with age but only slowly after 5 years. (3) No strong differences in performance exist between 7- and 8-in. pavements. (4) Unsightly longitudinal cracking occurred and the transverse steel was inadequate. (5) Construction joints and terminal joints are potential trouble spots. (6) Pumping can occur. (7) Satisfactory performance of the sections with 0.3 percent steel for much longer than the 20-year period is not expected. Overall, the project was very successful and has yielded much information to aid in the design of other pavements of this type. (BPR Abstract)
A Twenty-Year Report on the Illinois Continuously Reinforced Pavement
J. E. Burke (Autor:in) / J. S. Dhamrait (Autor:in)
1967
42 pages
Report
Keine Angabe
Englisch
Twenty-year report on Illinois continuously reinforced pavement
| Engineering Index Backfile | 1968
Ten-year report on Illinois experimental continuously reinforced pavement
Engineering Index Backfile | 1958
Field Performance of Continuously Reinforced Concrete Pavement in Illinois
| British Library Online Contents | 1999