The proper placement, consolidation, and finishing of low-slump concrete without the aid of pre-erected side, forms has been widely acclaimed as an economical and effective procedure in the construction of portland cement concrete pavements. This construction procedure, commonly referred to as slip-form paving, depends upon the ability of low-slump concrete to remain in place after consolidation and removal of forms.

Slip-form pavers differ from conventional pavers in that no fixed side forms are required inasmuch as the slip-form paver has side forms that advance with the machine. Concrete is merely deposited on the prepared subgrade in front of the machine, which strikes off and consolidates the concrete. The slab is then shaped by an extrusion plate and given an initial floating. The slab is given another floating and then dragged with a burlap drag. All that remains to be done is curing the concrete and sawing the joints. A slip-form paver replaces several pieces of equipment that are normally required for conventional paving. Not only is a reduction in capital investment brought about by the use of slip-form pavers, but a savings is also realized in the accompanying reduction of labor. Savings from 20 to 45 cents per square yard have been reported by other states.

Report Date


Report Number

No. 289

Digital Object Identifier



The opinions, findings, and conclusions. In this report are not necessarily those of the Department of Highways or the Bureau of Public Roads.