{[top") ?> {[text|Is a special concrete required?| A simple designated pumpable RC 25 concrete with a slump of S2 or S3,(70-120mm slump factor) with max. 10 mm aggregate should be specified. Ask for concrete supplied under QSRMC or BSI quality-assured schemes. ") ?> {[text|How is the concrete placed and does it need vibrating?| The pump-grade concrete is placed into the formwork by means of a pump or skip and fill the system through gravity flow. The correct pump grade concrete will flow, fill and self-compact without the need for mechanical vibration, although you may need to tamp in areas where there is dense steel work such as in basements. ") ?> {[text|How many pours are reqired per storey?| The pattern of concreting will vary from project to project, depending on circumstances and resources available. A storey height pour may be completed in one operation. Download our Lantac document you will find all the information you require in that. ") ?> {[bottom") ?>