The basic mix ratio for concrete is one part water, two parts cement and three parts sand. An alternative ratio is one part cement, two parts sand and three parts gravel with enough water added until the mixtures reaches the consistency of thick mud. Lime is also a common additive to the mix.Continue Reading
Concrete and mortar can be made from a mixture of masonry sand and either Portland cement or masonry cement. The addition of hydrated lime makes the concrete more plastic-like when it's wet and stronger and more durable after the concrete hardens. Masonry cement comes with lime already included.
For custom cement and mortar recipes, which result in concrete and mortar of varying strengths, Portland
and masonry cement are measured by the bag. A 94-pound bag is standard. Lime comes in 50-pound bags. Masonry sand is usually sold loose and delivered by a truck, and it's measured by the mounded shovelful.
The cement or mortar is mixed by first adding a portion of the water. The sand and cement are then poured into the water, and the mixture is stirred for several minutes. More water, cement or sand can be added if the mixture is too wet or dry.Learn more about Building Materials
One rule for mixing concrete is 1 part cement and 2 parts sand to 3 parts aggregates by volume or about 10 to 15 percent cement, 60 to 75 percent aggregate and 15 to 20 percent water by weight. Entrained air in many concrete mixes may also take up another 5 to 8 percent of the mixture.Full Answer >
The standard ratio for general purpose mortar, type N mortar, is one part Portland cement, one part lime and six parts sand. Type N mortar is typically used for exterior walls above ground level that are exposed to the elements. It is also appropriate for interior load-bearing walls.Full Answer >
The ratio to mix mortar is historically accepted as 1:3 of sand and cement. Mortar is a mixture of cement used in the building trade to hold bricks together.Full Answer >
Lean concrete is a mix where the amount of cement is lower than the amount of liquid present in the strata. This makes it ideal as a base layer where other kinds of concrete are placed on top. It is good for providing a flat bottom in uneven or dirt terrain.Full Answer >