METHOD FOR DOUBLE-LAYER CONSTRUCTION ARTICLE PRODUCTION AND ARTICLE PRODUCED BY SAID METHOD Russian patent published in 2007 - IPC B32B7/02 B28B1/16 

FIELD: construction, particularly building materials, namely landscaping articles, for instance figured paving stones and so on.

SUBSTANCE: method involves laying rigid concrete mix in form to create main layer; performing vibration compacting thereof; placing rigid concrete mix over main layer to create decorative face layer; carrying out final vibration compacting thereof and curing the obtained article. Main layer consists of the following concrete mix (% by weight): cement - 13.1-13.2, gravel with 3-10 mm particle dimensions - 39.6-39.9, sand - 43.4-43.7, remainder is water. Prior compaction is carried out with 120-250 g/cm² pressure for 0.5-5.0 c. Decorative face layer is created of rigid concrete mix including the following components (% by weight): cement 18.2-18.6, quartz or dolomite flour - 1.1-2.9, decorative filler - 71.0-75.8, remainder is water. The decorative filler is mixture including sand, serpentinite, decorative granite and marble having 0.9-7 mm particle dimensions or mixture including sand, amphibolite, serpentinite and marble having 0.9-7 mm particle dimensions or mixture comprising sand, amphibolite, granite and marble having 0.9-7 mm particle dimensions. Final compaction is performed under specific pressure of 110-140 g/cm² for 3.0-12.0 c. After that the article is placed in curing chamber. Decorative face layer of hardened article is subjected to grit blasting or sand blasting. Double-layered building article produced by above method is also disclosed.

EFFECT: enhanced appearance of face article surface, improved natural stone simulation, increased strength and service life, improved stability to surface damage and salt precipitation, decreased water sorption, increased wear and frost resistance, decreased material consumption and costs due to minimized pigment usage.

14 cl, 5 ex