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CNAA / Theses / 2006 / May /

Manufacturing techniques of carrying elements from easy constructional concrete

Author: Gersh Fishman
Degree:doctor of engineering
Speciality: 05.23.08 - Technology and Organization of Construction Work
Scientific adviser: Nicolae Pruteanu
Scientific consultant: Ariel Goldman
doctor în ştiinţe tehnologice, profesor universitar, Israel


The thesis was presented on the 15 May, 2006
Approved by NCAA on the 28 September, 2006


Adobe PDF document0.45 Mb / in romanian


CZU 624.153.522

Adobe PDF document 6.14 Mb / in russian
170 pages


technology of concreting, highly strong concrete, microsilicate, hypersofteners, technological parameters, labour input


The dissertation is devoted to development of technology of concreting of polytypic monolithic designs from an easy concrete mix which allows to adjust mesostructure a cement stone, up to 33 % reduces a body weight of carrying designs due to that essentially seismic stability of buildings and constructions improve, to reduce by 40 % of an expenditure of labour at stacking a concrete mix due to improved rheological characteristics and for the account of higher speed of increase of durability of a cement stone and twice to increase turnaround casing systems.

The compounding of the facilitated high-strength concrete is developed. The density of a just prepared mix is within the limits of 1600 … 2400 kg / m3 and durability on compression within the limits of 12 … 85 MPa, combining thus properties heavy (high durability) and easy concrete (low heat exchange).

Mathematical models of dependence of durability of a cement stone from density and the volumetric contents of easy filling are developed.

Value of differential factor of viscosity for the developed concrete mix is determined.

Generalizing theoretical dependences of movement of firm particles in viscous liquids which will be coordinated to earlier known theoretical dependences are received.

Experimentally technological parameters of vibrating for effective condensation without stratification of concrete mixes containing easy filler have been determined theoretically and confirmed.

Technological maps of process of stacking of the facilitated high-strength concrete which on 40 % reduce expenditures of labour of processes of stacking are developed.

Substantive provisions of the dissertation are stated in five scientific articles and in one patent for the invention. The dissertation is written in Russian and contains: 166 pages, 17 photos, 24 tables, 9 schedules, 17 figures and drawings and the list of references from 125 names.