PSI - Issue 20

Kuzmin S.A. et al. / Procedia Structural Integrity 20 (2019) 278–283

281

Kuzmin S.A. et al. / Structural Integrity Procedia 00 (2019) 000–000

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3.2. Wood There were conducted some researches of influence of polymeric impregnation on wood. Tests were carried out on compression according to GOST 16483.10-73 and on a statistical bend according to GOST 16483.3-84.

Fig. 3. - Results of tests (a) - on compression;( b) - on a statistical bend, the wood modified and unmodified by “Silor-Ultra KM” composition

Modification of samples from an undegraded tree at compression increases durability by 35%. Modification of samples from an undegraded tree at a statistical bend increases durability more than by 14% by Cuba et al (2014). The polymeric additive “Silor-Ultra KM’ can be applied both to a undegraded tree for protection and life extension, and for a degraded tree for restoration of strength properties and bearing capacity of wood.

3.3. . Arbolite

There were conducted researches on receiving wood concrete on waste of the pine and dahurian larch growing in forests of the region (86.9%) with providing high quality of a material, at the same time there were not used the cement binding substances by Egorova ( 2013). Table1. The consumption of materials and results of an experiment.

Composition of consumption, %

Durability limit at compression ܴ , MPa

Average density of samples, kg/m 3

Additive of Silor UltraT, % of the mass of spill

Number of consumption

Water cement proportion

Portland cement (PC)

spill

sand

1 consumption 2 consumption 3 consumption

27,8 30,3 30,3

16,6

55,6 60,6 60,6

0,50 0,50 0,59

- -

1130 1504 1495

0,25 1,18 2,10

9,1 9,1

25

Chips treated with lime milk by impregnation for 30 minutes were added to compositions 1 and 2. Consumption of “Silor-Ultra T” impregnation was 25% of chip weight. At the same time dry chips were treated with modifying additive before concrete consumption preparation (consumption 3). The treated chips were then put into the cement sand consumption and after careful mixing there were prepared 10x10x10 cm cube samples by tamping. Analyzing the obtained experimental data, it is possible to note that at reduction of a consumption of chip by 3.5% at identical technology of receiving samples (consumptions 1 and 2), indicators of average density increase by 33%, and strength at compression almost by 5 times.