Understanding waterstops: To ensure success, one must specify for performance, install with care

Conventional or stay-in-place forming should be installed tight around thermoplastic waterstops to prevent concrete from seeping out and curing across the depth of the waterstop. Such cured concrete seepage can reduce the waterstop’s performance. Applications for hydrophilic waterstops are not limited to cast-in-place concrete construction joints. Due to their flexibility and conformability, hydrophilic waterstops can […]

Split-slab waterproofing in high-load traffic environments – Page 3 of 3

The slab was placed in alternating strips with greased dowels at all the joints. Assuming a tire pressure of 690 kPa (100 psi), and distribution of this pressure over an area larger than the tire footprint, the average stress to which the waterproofing will be subjected is in the range of about 275 to 415 […]

What is new in ACI 301-20, Specifications for Concrete Construction – Page 5 of 5

Evaluation requirements for concrete made with self-consolidating concrete and structures that are designed for modulus of elasticity are included in the updated ACI 301-20. Section 10—Shrinkage-compensating Concrete for Interior Slabs Section 10 covers requirements for concrete made with cementitious material conforming to ASTM C845, Standard Specification for Expansive Hydraulic Cement, for interior slabs designated by […]