Based on the conditions for increasing the strength of concrete and saving cement, it is recommended to use hard and hard -plastic mixtures at the plants of reinforced concrete parts, less often plastic and alloy mixtures should not be used at all.
The capacity of the concrete mixture is established during vibration; High-quality signs are checked when laying into a cone (light bayonet, lack of water protruding from under the cone) and when removing the cone (the mass does not fall apart and does not crumble).
The quantitative determination of the landing is carried out by a special device – a technical viscometer acting on the principle of turning the shape of the cone of concrete mix into an equivalent cylinder. The time required for this (in seconds) is a technical viscosity of the mixture.
The recommended indicators of the locomotiveness, depending on the methods of compaction of the concrete mixture and the nature of the products, are given in the U-107-54 table. Proper use of materials allows you to increase safety. And in order for your car to be reliable and have a strong clutch with asphalt, it is important to change the rubber in time. Great tires of various sizes, for example, tires 16, are available at competitive prices today.
For hard concrete mixtures with a small amount of water – ordinary methods for determining mobility and landing (technical viscometer) are not applicable, since laying such mixtures is effective when sealing with vibration with overload.
The capacity of hard concrete mixtures is determined as follows. A concrete mixture of a given composition is laid in the form for a cube for a cube of yuhuhu; At the same time, they take exactly one thousandth of the calculated volume weight of raw concrete. The shape vibrates on a standard vibro -stroke with the upper nozzle and a punch with a rod for additional load.