Table of Contents November 1977

FEATURES

Other Articles

• Energy-Efficient Permanent Forms Insulate Building, Reduce Construction Time

   

• Room Forms for Multi-Unit Shear Wall Structures

   

• Technical Reasons for Falsework Collapse

   

• Slipform and Flying Floor Forms Work Together on High-Rise Condominiums

   

• Concrete Forming for Water and Waste Treatment Plants

   

PROBLEM CLINIC

• Jointing desirable in small slabs

  Should a 20- by 20-foot garage floor slab be jointed? Many recommendations for contraction joints allow spacings of 15 to 25 feet.

   

• Avoiding cracking in shotcreted pools

  We have very small shrinkage cracks in some shotcreted pools. No water is lost through these cracks but they cause cracking in the plaster applied over the shotcrete. Some pools have three or four cracks running the length and width of the pool but others have none at all. Water curing has not...

   

• Early strengths of Type IP and Type I cements

  Our company is being urged to use Type IP cement on a job in place of Type I. We understand that the Type IP in our area is made by substituting fly ash for some of the cement. Although the concrete made with Type IP is said to be more workable we are worried about early strength. Is it true that...

   

• Control of rebar corrosion in bridge decks

  What is the best procedure to control rebar corrosion in bridge decks?