New concrete should be cured for at least 28 days and should have a pull off strength ≥1.5 N/mm². Cement or mineral based substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and to achieve an open textured surface
Loose friable material and weak concrete must be completely removed and surface defects such as blowholes and voids must be fully exposed.
Protrusions of more than 3mm must be removed. All intersections of horizontal and vertical surfaces should be profiled with a mortar fillet of 25 x 25 mm.
CHENG HUAT HARDWARE (SENTUL) SDN BHDBuilding Materials Kuala Lumpur (KL), Hardware Supply Selangor, Hand Tools Supplier Malaysia ~ CHENG HUAT HARDWARE (SENTUL) SDN BHD
