scholarly journals Stone-concrete – material for rockfill dam face zone

Author(s):  
A S Bestuzheva ◽  
D V Gadai ◽  
R M Sadekov
2021 ◽  
Vol 13 (2) ◽  
pp. 152-164
Author(s):  
Muhammad Zakaria Umar

In Kendari City, the concrete structure made by construction workers consists of: (a) concrete for the lower class; (b) concrete for middle society, and; (c) concrete for the upper community. The concrete is made with different sand material. This research is important to find out the method of making concrete made by construction workers in Kendari City. This research is intended to test the compressive strength and absorbency of the concrete made by construction workers in Kendari City. This study uses an experimental method with a quantitative approach. Based on laboratory test results that concrete material from 100% Unaha sand with the composition of 1 sack of cement: 4 barrel of unaha sand included in structural concrete. Concrete material from split stone and Pohara sand with a composition of 1 sack of cement: 4 barrel of Pohara sand : 4 barrel of split stone, concrete material from Unaha sand and Pohara sand with a composition of 1 sack of cement: 4 barrels of Unaha sand : 4 barrels of Pohara sand, concrete material from 100% Nambo sand with the composition of 1 sack of cement: 4 barrels of Nambo sand, concrete material from Nambo sand and Unaha sand with a composition of 1 sack of cement: 3 barrels of Nambo sand : 1 barrel of Unaha sand, and concrete material from Nambo sand and Sabulakoa sand with composition of 1 sack of cement : 3 barrels of Nambo sand : 1 barrel of Sabulakoa sand are included in non-structural concrete.


2019 ◽  
Vol 97 ◽  
pp. 02026
Author(s):  
Alexandra Bestuzheva ◽  
Ilya Tsipurskiy ◽  
Dimitri Gadai

The properties of the face zone material as a flexible foundation of the face play an extremely important role in the formation of stress-strain state of rockfill dams with reinforced concrete face. Stone-concrete, made by watering the stone backfill with cement-sand mix containing water-reducing agents is proposed to be used as such foundation in the paper. Methods of selecting the composition of the casting mixture and search results of its optimal composition by the method of factor analysis are given in this paper. The properties of stone-concrete are investigated and a dam design technique is developed based on the selection of optimal properties for the face zone of that material.


2021 ◽  
Vol 264 ◽  
pp. 03022
Author(s):  
Aleksandra Bestuzheva ◽  
Dimitri Gadai

At present, over 600 dams with a reinforced concrete face are built worldwide; 7 of them are higher than 200 m. However, most of these dams have an inherent disadvantage – face cracking [1, 2, 3], caused by face deformations resulted from the difference in deformation properties of the face and downstream toe. To solve this problem, the authors consider the arrangement of a massive stone-concrete face zone.


2015 ◽  
Vol 60 (1) ◽  
pp. 81-102
Author(s):  
KErstin Thomas

Kerstin Thomas revaluates the famous dispute between Martin Heidegger, Meyer Schapiro, and Jacques Derrida, concerning a painting of shoes by Vincent Van Gogh. The starting point for this dispute was the description and analysis of things and artworks developed in his essay, “The Origin of the Work of Art”. In discussing Heidegger’s account, the art historian Meyer Schapiro’s main point of critique concerned Heidegger’s claim that the artwork reveals the truth of equipment in depicting shoes of a peasant woman and thereby showing her world. Schapiro sees a striking paradox in Heidegger’s claim for truth, based on a specific object in a specific artwork while at the same time following a rather metaphysical idea of the artwork. Kerstin Thomas proposes an interpretation, which exceeds the common confrontation of philosophy versus art history by focussing on the respective notion of facticity at stake in the theoretical accounts of both thinkers. Schapiro accuses Heidegger of a lack of concreteness, which he sees as the basis for every truth claim on objects. Thomas understands Schapiro’s objections as motivated by this demand for a facticity, which not only includes the work of art, but also investigator in his concrete historical perspective. Truth claims under such conditions of facticity are always relative to historical knowledge, and open to critical intervention and therefore necessarily contingent. Following Thomas, Schapiro’s critique shows that despite his intention of giving the work of art back its autonomy, Heidegger could be accused of achieving quite the opposite: through the abstraction of the concrete, the factual, and the given to the type, he actually sets the self and the realm of knowledge of the creator as absolute and not the object of his knowledge. Instead, she argues for a revaluation of Schapiro’s position with recognition of the arbitrariness of the artwork, by introducing the notion of factuality as formulated by Quentin Meillassoux. Understood as exchange between artist and object in its concrete material quality as well as with the beholder, the truth of painting could only be shown as radically contingent. Thomas argues that the critical intervention of Derrida who discusses both positions anew is exactly motivated by a recognition of the contingent character of object, artwork and interpretation. His deconstructive analysis can be understood as recognition of the dynamic character of things and hence this could be shown with Meillassoux to be exactly its character of facticity – or factuality.


Author(s):  
Jason Toynbee

The is chapter argues that to understand the distributed nature of musical creativity we need to examine its connection to large-scale social structure and to capitalist relations of labour. These relations have a ‘downward’ causal impact on creative acts. Firstly, this is through the division of labour, which plays out in different ways across genres from classical to pop. Secondly, creative musical labour involves engagement with the concrete, material world. The distributed nature of creativity is determined not only by the drive to divide or consolidate music-making tasks but also depends on the nature of the musical materials to hand, and methods of dealing with them. Two methods are described in this chapter: translation and intensification. Each (sometimes they are combined) entails the making of relatively autonomous creative choices which are emergent from the structural and material conditions of musical labour.


1977 ◽  
Vol 13 (1) ◽  
pp. 80-82
Author(s):  
I. V. Nedashkovskii ◽  
A. I. Panteleev ◽  
N. I. Voronkov

2011 ◽  
Vol 291-294 ◽  
pp. 1015-1020 ◽  
Author(s):  
Chong Jin ◽  
Hong Wang ◽  
Xiao Zhou Xia

Based on the superiority avoiding the matrix equation to be morbid for those fitting functions constructed by orthogonal base, the Legendre orthogonal polynomial is adopted to fit the experimental data of concrete uniaxial compression stress-strain curves under the frame of least-square. With the help of FORTRAN programming, 3 series of experimental data is fitted. And the fitting effect is very satisfactory when the item number of orthogonal base is not less than 5. What’s more, compared with those piecewise fitting functions, the Legendre orthogonal polynomial fitting function obtained can be introduced into the nonlinear harden-soften character of concrete constitute law more convenient because of its uniform function form and continuous derived feature. And the fitting idea by orthogonal base function will provide a widely road for studying the constitute law of concrete material.


2021 ◽  
Vol 278 ◽  
pp. 122419
Author(s):  
Zhangyu Wu ◽  
Jinhua Zhang ◽  
Qin Fang ◽  
Hongfa Yu ◽  
Ma Haiyan

2021 ◽  
Vol 80 (8) ◽  
Author(s):  
Feng Ming ◽  
Xiu-Ling Ren ◽  
Jin-guo Wang ◽  
Zhi-wei Zhou ◽  
En-Long Liu ◽  
...  

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