SU65406A1 - A method of manufacturing building masses based on cement with the addition of calcium chloride - Google Patents

Description

As is known, the chloride of altium is a common accelerator for the hardening of mortars and concrete. In the method proposed by the authors, calcium chloride is formed as a result of the reaction between unslaked, hydrochloric acid and hydrochloric acid introduced into the mixture. . A significant feature of the proposed method of making building masses is the introduction of lime-lime into a mixture of sand and inert fillers before (introduction of cement followed by mixing with water acidified with hydrochloric acid. As a result of rapid lime-acid recovery, calcium hydrochloride occurs, accompanied by strong heating, see You see, and to .M101, the introduction of cement, hydrochloric acid is practically “neutralized.” The difference from the common in the technique of representation of and applying a dense concrete masses quicklime, because the increase of its volume with gascheny must weaken the material strength (prof. Nekrasov Technology, November 1932), author shown.

that in the indicated conditions. Introduction of lime-boiling liquor together with hydrochloric acid completely justifies itself. The proposed process proceeds in the following sequence of operations.

Calculated dosages of inert (sand, gravel, etc.) are loaded into the ladle mortar or concrete mixer and nepaplen lime in an amount of 5--10% of the cement weight, ground to a fineness of grinding with a residue of not more than 20% on a sieve with 4900 holes / cm and passing without residue through a sieve of 900 holes / cm. The mixture moves dry from 0.5 to 1 minute. Thereafter, the calculated amount (for a given consistency) of water acidified with 3 to 10% hydrochloric acid is added (the mass is mixed again from 0.5 to 1 minute, after which the calculated amount of cement is loaded. The mixture is mixed (mixed 5- 2 minutes.

Possible 1 time: the same effect of hydrochloric acid: on reinforcing steel in reinforced concrete is prevented by teraising the hydrochloric acid by the time the cement is injected. The extinguished lime, pollinating inert and filling part of the pores at the closure of the VAD, with acidic hydrochloric acid, quickly reacts with the strong acid with the latter. it mixes up and prepares the surfaces inert for active coagulation and participation in the subsequent hardening of the cement. In this way, a fast PIOCT mechanism is achieved. The mechanical strength of mortars and concretes, which, by 4 hours after mixing, reach a daily strength compared with an ordinary mortar or concrete, and in 72 hours they give a concrete or mortar strength equal to that of

28 days old

ordinary concrete or mortar.

Subject matter

A method of manufacturing building masses based on cement with the addition of lime-boil and hydrochloric acid, characterized in that, in order to accelerate the reaction of hardening and increase of strength, the limestone is injected into the mixture with inert 1, water is added with the addition of hydrochloric acid, and then added they are cement and mixed.