| 摘要 |
<p>A process and apparatus for producing a low density foam concrete, in which a recycled, excavated material is used to form the concrete mix. The material may be crushed and graded and used in a ratio of 6:1 with the cement component. A preformed foam may be used to obtain a high void volume and a placticiser added to improve fluidity. The foam concrete is manufactured on-site on a continuous basis using a mobile concrete making vehicle (1) having an elongate tubular mixer (4) into which the components are introduced at selected points (20A,20B,20C) along its length, so as to control the final composition of the mix. The mixer (4) has internal agitating means (22) that cause backflow to enable the concrete to be dispensed directly at ground level. <IMAGE></p> |
