A practical treatise on soluble or water glass, silicates of soda and potash, for silicifying stones, mortar, concrete, and hydraulic lime .. . l, six parts ; sand, four parts ; andquick-lime, one and a half part, with sufficient quan-tity of silicate of soda, so as to make the compositionplastic. When this mass was well mixed and turnedover three or four times, it was thrown into the tren-ches in layers or courses of, say, four inches in course was spread over the whole of the founda-tion trenches, until they were all, including those ofthe foundations of cross-walls, filled. When
A practical treatise on soluble or water glass, silicates of soda and potash, for silicifying stones, mortar, concrete, and hydraulic lime .. . l, six parts ; sand, four parts ; andquick-lime, one and a half part, with sufficient quan-tity of silicate of soda, so as to make the compositionplastic. When this mass was well mixed and turnedover three or four times, it was thrown into the tren-ches in layers or courses of, say, four inches in course was spread over the whole of the founda-tion trenches, until they were all, including those ofthe foundations of cross-walls, filled. When the sur-face of the basement or cellar bottom was reached,then the whole area was gone over with a coat ofgravel; and over this was poured a creamy mixtureof water-lime and sharp river sand, in equal propor-tions, until the whole was flush. This was done onSaturday, and on the following Monday the floor washard enough to walk upon. The basement wallswere now commenced in the manner here lines of the walls were carefully laid out, andangle-moulds placed at each corner, with straightmoulds set at equal distances all along. fK. CEMEXTS. 231 A corner mould and three or four straight mouldsare sufficient to work with : but the greater the num-ber of moulds the more expeditiously the operationof building goes on. When all was ready, the cornermoulds were filled first, and then the other mouldsregularly in turn. When all were filled, the mouldswere taken apart and set up at other points along thewalls; but sufficient time was given for the beton tobecome hard enough to admit of being walls being thus gone around, the next operationwas to inclose the spaces between the beton blocks^and this was done by using the sides of the moulds,without the ends, and holding them in place by thefollowing means : Two pair of pieces of scantling,say two by three inches each, and two feet long, wereset upright at each end of the side-boards, and bear-ing them against the bet
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Keywords: ., bookcentury1800, bookdecade1870, bookidpracticaltre, bookyear1870
