...contain ferric oxide, magnesia or alkalies. Their affect according to Shewberry is as follows: Ferric oxide combines with lime at a high heat and acts like alumina in promoting combinations of silica and lime. For practical purposes the presence of ferric oxide in a clay need...

...aluminate. This composition may therefore be expressed by the formula X (3 CaO SiO z ) + Y (2 CaO Al, O,). "From this formula it may be calculated that the correct...practical purposes, however, the presence of iron oxide l n a clay need not be considered in calculating the proportion of lime required. "3. Alkalies, so...

...aluminate. This composition may therefore be expressed by the formula X(3CaOSiO,) + Y(2CaO A12 O8). "From this formula it may be calculated that the correct...practical purposes, however, the presence of iron oxide 1n a clay need not be considered in calculating the proportion of lime required. ' '3. Alkalies, so...

...aluminate. This composition may therefore be expressed by the formula X (SCaOSiOJ + Y(2CaO A12 O.). "From this formula it may be calculated that the correct...practical purposes, however, the presence of iron oxide ln a clay need not be considered in calculating the proportion of lime required. ' '3. Alkalies, so...

...the proportions demanded by the formula. Newberry's other conclusions are summarized as follows :* "Iron oxide combines with lime at a high heat, and...considered in calculating the proportion of lime required. "Alkalies, so far as indicated by the behavior of soda, are of no value in promoting the combination...

...the proportions demanded by the formula. Newberry,s other conclusions are summarized as follows :* "Iron oxide combines with lime at a high heat, and...considered in calculating the proportion of lime required. "Alkalies, so far as indicated by the behavior of soda, are of no value in promoting the combination...

...ferric oxide. From a series of experiments the Messrs. Newberry concluded that: "Iron oxide (Fe.,03) combines with lime at a high heat, and acts like alumina...in calculating the proportion of lime required,'' and that "alkalies, so far as indicated by the behavior of soda, arc of no value in promoting the combination...

...ferri oxide. From a series of experiments the Messrs. Newberry concluded that: "Iron oxide (Fe203) combines with lime at a high heat, and acts like alumina...considered in calculating the proportion of lime required," and that "alkalies, so far as indicated by the behavior of soda, are of no value in promoting the combination...

...ferric oxide. From a series of experiments the Messrs. Newberry concluded that: "Iron oxide (Fe203) combines with lime at a high heat, and acts like alumina...considered in calculating the proportion of lime required," and that "alkalies, so far as indicated by the behavior of soda, arc of no value in promoting the combination...

...that the correct proportion of lime, by weight, in Portland cement, is 2-8 times the silica phis I'l times the alumina." 2. " Iron oxide combines with lime at a high temperature, and acts like alumina in promoting the combination of silica and lime. For practical purposes,...