| 摘要 |
<p>A method of lining a chimney 10 is described, comprising lining the chimney with a cementitous composition. The composition comprises, by weight, 50 - 80% of base cement, 8 - 28% by weight of high alumina cement (HAC), 12 - 24% by weight of expanded perlite and up to about 0.08% of ceramic fibres. The ceramic fibres may be elongate micro fibers with a length from 19-40mm. A chimney lining composition with this formulation is also detailed. The composition gives a preliminary setting time of about an hour. The lining may be applied to the chimney 10 by pumping the composition between the walls of the chimney and an inflatable former 11. Thus the inflatable former 11 can be removed much sooner than is the case when alternative compositions are used.</p> |
