Crack resistance and deformability of complex-activated calcareous and siliceous composites
Ye. S. Shynkevych
Odessa State Academy of Civil Building and Architecture
Annotation: The paper is focused on the study and properties control, containing parameters of mechanics of failure in complex activated calcareous and siliceous composites to fabricate wall injection molding products by casting energy conservation technique. The proportional dependence of the critical stress intensity factor (kIс) from fine aggregate content of calcareous and siliceous fine-grained concrete has been set up on the basis of the test and statistic pattern indicating the possible identity of the cracking mechanisms in cement and calcareous and siliceous composites. The findings have shown that with increasing of the fine aggregate content, the probability of microcracks retardation by filling grains have been grown. The subordination to the local optimum of the critical stress intensity factor when affected by hardening conditions has been set up: kIс increases to its maximum, then decreases. The deviation from the optimal values of hardening conditions and compositions leads to reduction of kIс connecting with the formation of prerupture zone on the contact of a matrix with a filler in these conditions. The impact of composition factors and technique on the modulus of elasticity has been analyzed. The expediency of application of the set of quality indicators, including crack resistance and deformability at compositional optimization and hardening conditions of activated fine calcareous and siliceous composites.
Keywords: crack resistance, critical stress intensity factor, calcareous and siliceous composites, test and statistic modelling, activation, modulus of elasticity.
Pages: 205-213.
Link for citation: Shynkevych, Ye. S. Crack resistance and deformability of complex-activated calcareous and siliceous composites. – Text : electronic. – In: Modern Industrial and Civil Construction. – 2011. – Vol. 7, N 4. – Р. 205-213. – URL: https://donnasa.ru/publish_house/journals/spgs/2011-4/02_schinkevich.pdf (date of access: 16.09.2024). (in Russian)
Vol. 7, N 4 (2011)Journal: Modern Industrial and Civil Construction
Publish house: Donbas National Academy of Civil Engineering and Architecture