...concrete is determined by the proportion and quality of the ingredients. For very strong concrete work one part of cement, two parts of sand and four parts of gravel are mixed together with water and allowed to set. For very weak concrete, one part of cement,...

...outer edge of the pavement on each side. The concrete in all cases has been mixed in the proportion of one part of cement, two parts of sand and four parts of screened gravel or broken stone. Where the old base was badly shattered it was entirely removed and...

...yete. PROPORTION OF AGGREGATES IN MAKING CONCRETE THINGS A 1 : 2 : 4 mixture means a mixture containing one part of cement, two parts of sand, and four parts of stone or gravel. A sack of cement occupies one cubic foot of space. If a 1 : 2 : 4 mixture is desired,...

...bolted to the straps, and the upper part is coated with one part of cement to two parts of sand, or with a mixture of one part of cement, two parts of sand, and four parts of broken stone, all stone to pass a i-in. mesh. When this has set, the underside is coated with a mixture of one part...

...sand and upon the use of the proper proportions of cement, sand, and gravel. For the stable floor, a mixture of one part of cement, two parts of sand, and four parts of gravel, or crushed stone, is recommended. This is commonly called a 1-2-4 mixture. A bag of cement...

...diagonal plane shall be one-fiftieth of the ultimate compressive strength. (g) For a concrete composed of one part of cement, two parts of sand and four parts of broken stone, the allowable unit stress for adhesion per square inch of surface of imbedment shall not exceed the...

...tables accompanying this report by the letter "g" placed after the mix number. Thus 1 :2 :4g means that one part of cement, two parts of sand, and four parts of graded stone were used. Similarly 1 :2g :4 would indicate that the sand in the mix was graded. Graded...

...and so carries the weight of the superstructure equally all over it. The concrete should be composed of one part of cement, two parts of sand, and four parts of gravel or stone or brick broken small. Broken stone or brick with rough edges is to be preferred to...

...any of the standard mixtures of concrete. For a strong floor a concrete base mixed in the proportion of one part of cement, two parts of sand, and four parts of stone is preferable. It will usually prove worth while to insert steel reinforcement in all floors...

...proportions which have been found to produce satisfactory results under average conditions. These are one part of cement, two parts of sand, and four parts of coarse aggregate (expressed 1: 2: 4) for most classes of construction. In the manufacture of products...