Self consolidating concrete for precast prestressed concrete bridge elements Grannies online free chat

SCC is a highly flowable and non-segregating concrete.

SCC has the ability to flow through congested reinforcements efficiently irrespective of the structure geometry.

As a result, WSDOT requires the following design modification factors for use with SCC in precast, prestressed concrete girders: Lessons Learned This project did not tell us much about the structural properties of the SCC because the girders were deep, only 80-ft (24.4 m) long, and lightly prestressed with about 3/4 in. From the production perspective, WSDOT was concerned that SCC placed into a deep girder might segregate, but that did not happen. and Mitchell, D., "Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements," Transportation Research Board, NCHRP Report 628, Washington, DC, 2009.

The placement went smoothly with fewer workers required than for a conventional concrete girder, and the finishing work was significantly reduced because of the high quality finish right out of the form.

The project involved replacing two 77-year old bridges and widening lanes and shoulders along and over the Tieton River, about 14 miles (22.5 km) west of Naches, WA.

Built in 1933, the original bridges were only 24 ft (7.3 m) wide and classified as structurally deficient.

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The Tieton River Bridge was the first use of self-consolidating concrete (SCC) for a precast, prestressed girder superstructure by the Washington State Department of Transportation (WSDOT).

Apart from regular factors considered in analysis of concrete pavements, temperature effects influence the slab size, joint spacing and temperature reinforcement design.

An experimental program has been undertaken, to assess the thermal conductivity values for M-40 grade of SCC mixes with manufactured sand.

Class C flyash has been used as a cement replacement material.

This paper is an attempt to present the experimental results obtained for thermal conductivity studies undertaken on M-40 grade of SCC with optimized flyash dosage and perlite dosage.

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