Silos and silage . , as this willslightlv strengthen thesilo. One coat of acement plaster is usu-ally sufficient, using 1part Portland cementand 3 parts clean,sharp sand by volume,to which is added 10percent screened, hy-drated lime. If dry,dampen the laths be-fore applying the mix-ture, as dry wood ab-sorbs the moisturefrom the plaster. Thefinished wall should beas smooth as it is pos-sible to make it, sincethis will reduce frictionand allow the silage tosettle properly. Theplastering may be done in a wet season. At any rate do notallow the wall to dry too rapidly. If it dries too rapidly,dam
Silos and silage . , as this willslightlv strengthen thesilo. One coat of acement plaster is usu-ally sufficient, using 1part Portland cementand 3 parts clean,sharp sand by volume,to which is added 10percent screened, hy-drated lime. If dry,dampen the laths be-fore applying the mix-ture, as dry wood ab-sorbs the moisturefrom the plaster. Thefinished wall should beas smooth as it is pos-sible to make it, sincethis will reduce frictionand allow the silage tosettle properly. Theplastering may be done in a wet season. At any rate do notallow the wall to dry too rapidly. If it dries too rapidly,dampen with water. ^It is a good plan to go over the wallwith a coat of cement wash mixed to the right consistencyand apphed as whitewash. A mixture of equal parts of coaltar and gasoline is also excellent. This can be applied overthe cement wash. Roof. The roof illustrated in Figure 12 is made of lightmaterial and the sections can be easily opened and chief advantage is that the capacity of the silo is in-. Fig. 11.—Straight Door Set in Door Frame. July, 1916] SILOS AND SILAGE 23 creased. If a gable roof is to be used it should be at leastYz pitch. The cost of a roof for a ten foot silo is about $ g-ambrel roof is still better (see Fig. 4) but will cost about80 percent more. Waterproofing Hoops. After the silo has been com-pleted the hoops should recei\e a coat of creosote, appliedhot. A mixture ofequal parts coaltar and gasolineor a mixture con-sisting of 1 gallonof coal tar and 1pound of pulveriz-ed rosin is some-times applied, thelatter mixture being heated andstirred over aslow fire. A littleoakum should beadded and thepreparation ap-plied to the hoopswhile it is forms awaterproof coatwhich greatly in-creases the dura-bility of thehoops. M^k \ ; ? i It ^^^^^^^^^^^^^H|^^^2^|S*^(HP|^^^^ ^^^^iik^i^i^^^^^H Fig. 12.—A Roof Which Increases tlie Capacityof the Silo. Concrete or Other Types of Silos. Owing to limitedspace, building plans, including l)il
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