Laserfiche WebLink
and Sidewalks" of the Standard Specifications and these Special <br />Provisions. <br />Concrete: Portland cement concrete shall be Class "B" <br />conforming to Section 90 of the Standard Specifications with a <br />minimum compressive strength of 2000 psi. at 28 days. <br />All concrete used shall be mixed completely in a truck mixer, <br />commonly known in the industry as "transit -mixed concrete." <br />Forms: Forming requirements shall conform to the provisions in <br />Section 73-1.04 "Forms" of the Standard Specifications. If clean, <br />neat lines can be cut, the Contractor may pour against undisturbed <br />earth with prior approval by the Engineer. If any sloughing or <br />caving of material occurs, both front and back forms may be <br />required. <br />Forms shall be true to lines and grades as shown on the plans. <br />Forms previously used shall be thoroughly cleaned before re -use. <br />Before concrete is placed within any form, all inside surfaces of <br />the forms shall be thoroughly coated with an approved oil. <br />All forms shall be free of any foreign material previous to <br />placing concrete. <br />Concrete Reinforcement: Mesh and reinforcing steel shall <br />conform to the provisions in Section 52-1.02 "Materials" of the <br />Standard Specifications. <br />All reinforcing steel shall be accurately placed as shown on the <br />plans. <br />All reinforcement shall be cleaned of dirt, rust, grease, loose <br />scale and any other substance that may prevent concrete bonding. <br />All reinforcement shall be securely positioned and supported so as <br />to maintain the proper position during placement of concrete. <br />Concrete Placement: Concrete shall not be placed without <br />approval of the Engineer. Placing concrete without notifying the <br />Engineer may be reason for rejection of the work. <br />Prior to placing concrete the subgrade and inside face of the <br />forms shall be thoroughly wetted as the Engineer may direct. <br />Concrete shall not be deposited when it appears likely that the <br />air temperature may fall below 400 F. during the placing of <br />concrete or within the following 24 hours, unless special approval <br />has been received from the Engineer prior to placing of concrete. <br />Concrete which, in the opinion of the Engineer, has been damaged <br />by freezing shall be removed and replaced. <br />6.10 <br />TANK6/TXTW.02M <br />