Microsurfacing (2010) / Chapter Skim
Currently Skimming:
Appendix C - Microsurfacing Example Contract Clauses, Specifications, and Checklists
Appendix C - Microsurfacing Example Contract Clauses, Specifications, and Checklists
Pages 104-114
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 104... ...
The test strip shall be constructed at the same time of day or night the full production will be applied and may be constructed in 2 days or nights when multiple course applications are specified. The Engineer will evaluate the completed test strip after 24 hours of traffic to determine if the mix design is acceptable.
|
From page 105... ...
The final surface course shall be completed using Gradation A aggregate, applied at a mi nimum application rate of 16 pounds/square yard (9 kg/m²) of dry aggregate or a Gradation B ma y be used with a mi nimum application rate of 20 pounds/square yard (11 kg/m²)
|
From page 106... ...
All temporary repairs shall be replaced with a permanent repair as soon as weather allows. The Contractor's construction traffic control for performing any work required or allowed by this specification during the warranty period shall be in accordance with current Department policy, the Ohio Manual of Uniform Traffic Control Devices for Streets and Highways, and subject to Department approval of the time the work will be performed.
|
From page 107... ...
The job mix formula shall be designed in accordance with the International Slurry Surfacing Association (ISSA) recommended standards by an ISSA recognized laboratory.
|
From page 108... ...
of 2.65. In the event that crushed steel slag aggregate is used as a part of the blended aggregate or as the entire aggregate, the BSG of the final aggregate blend shall be determined and shown as part of the job mix formula criteria.
|
From page 109... ...
413.10.5.3.3 Any successive passes shall be separated such that each layer placed undergoes approxi matel y 12 hours of traffic for co mp action and curing. 413.10.5.3.4 Type IIIR applications to raise shoulders or fill ruts shall be applied with the rut spreader box, and the contractor shall place a strip as designated in the contract docu ments to raise an area to ma tch the surroundings.
|
From page 110... ...
. Material safety data sheet Materials Checks Has a full mix design and compatibility test been completed?
|
From page 111... ...
Is the spreader box clean and is it a micro- surfacing type box? Equipment for continuous run operations Is all equipment free of leaks ?
|
From page 112... ...
Has moisture content been adjusted when calculating the application rate ? Project Inspection Responsibilities Micro-surfacing Applicatio n Has a satisfactory test strip been done ?
|
From page 113... ...
For example, an unstable emulsion, too little water in the mi x, incompatibility between the emulsion and the aggregate, and so on, ma y cause a slurry surface to delaminate. Trouble Shooting Microsurfacing Job Problems Problem Cause Br ow n W hi tis h Fa ilu re to S et Po or C oa tin g D el ay ed O pe ni ng to T ra ffi c Br ea ks in B ox R av el s Fl us he s D el am in at io n Se gr eg at io n Emulsio n Em ulsion unstable No No No • Yes No • Yes No No • Yes No Em ulsion too stable • Yes No • Yes No • Yes No • Yes No No No Em ulsion too hot No No No No No • Yes No No No No Too little em ulsion • Yes No No • Yes No No • Yes No No No Too mu ch emulsion No No No No No No No • Yes No No Mi x Mix: Too many fines No No No • Yes No • Yes • Yes No No No Mix: Too mu ch cement No • Yes No No No • Yes No No No No Mix: Too little cement No No • Yes No • Yes No • Yes No No • Yes Mix: Too little additive No No No • Yes No • Yes • Yes No No No Mix: Too mu ch additive No • Yes • Yes No • Yes No • Yes No No No Mix: Too mu ch water • Yes No • Yes No • Yes No • Yes • Yes No • Yes Mix: Too little water No • Yes No • Yes No • Yes • Yes No • Yes No Mix: Aggregate/emulsion not co mp atible No No • Yes • Yes • Yes No • Yes No • Yes • Yes 114
|
From page 114... ...
Poor Joints Reduce the amount of water at start up. Use water spray if runners of spreader box are running on fresh ma terial.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.