FIELD: construction engineering; manufacture of concrete and reinforced concrete articles.
SUBSTANCE: method of manufacture of concrete and reinforced concrete articles includes preparation of concrete mix, placing the mix in form, holding it in form and heat and moisture treatment. During preparation of concrete mix, complex additive is introduced in it in the amount of 0.1-0.85 of cement mass which contains the following components, mass-%: sodium nitrite, 10-21; C-3, 14-32; micro-silica, 47-75. Heat and moisture treatment is carried out by steaming by the following mode: raising the temperature to 40-70 C for 1-3 hours, holding at this temperature for 2-6 hours and cooling for 1-3 hours. For manufacture of precast reinforced concrete products, curing of concrete mix before heat and moisture treatment is carried out at temperature of 8-28 C continued for 0.5-3.5 hours.
EFFECT: enhanced strength of concrete at early hardening terms at retained high final strength.
2 cl, 1 tbl, 13 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPLEX ADDITIVE FOR CONCRETE MIXES AND MORTARS | 2006 |
|
RU2308429C1 |
| PRECAST REINFORCED CONCRETE PIECES PRODUCTION METHOD | 1991 |
|
RU2036188C1 |
| COMPLEX ADDITIVE TO CONCRETE MIXTURE | 2008 |
|
RU2369573C1 |
| DRY MIX FOR PREPARATION OF NON-AUTOCLAVE FOAM CONCRETE (VERSIONS) | 2013 |
|
RU2547532C1 |
| COMPLEX ANTIFROSTY ADDITIVE | 1991 |
|
RU2024457C1 |
| COMPLEX ORGANOMINERAL MODIFIER FOR CONCRETE MIXES AND MORTARS | 2011 |
|
RU2476395C1 |
| METHOD OF PRODUCING PLASTICIZED CEMENT | 1997 |
|
RU2094404C1 |
| COMPLEX ADDITIVE FOR CONCRETE MIXTURE | 2009 |
|
RU2425002C1 |
| COMPLEX ADDITIVE FOR CONCRETE MIXTURE | 2009 |
|
RU2422395C1 |
| PORTLAND CEMENT PRODUCTION METHOD AND PORTLAND CEMENT BASED CONCRETE AND REINFORCED CONCRETE PIECES PRODUCTION METHOD | 1995 |
|
RU2060979C1 |
