scholarly journals CHANNEL DEFORMATIONS FORECAST AND FEATURES OF FLOODPLAIN QUARRIES OF NON-METALLIC CONSTRUCTION MATERIALS DEVELOPMENT IN MEANDERING RIVERBEDS BASED ON SAFE NAVIGATION CONDITIONS (ON THE EXAMPLE OF THE BELAYA RIVER)

2020 ◽  
pp. 179-188
Author(s):  
Aleksandr N. Sitnov ◽  
Yulia E. Voronina ◽  
Marina V. Shestova
Keyword(s):  
Construction Materials ◽  
State Assessment ◽  
Channel State ◽  
Channel Deformations ◽  
Materials Development ◽  
Minimal Impact ◽  
Safety Issues ◽  
Safe Navigation ◽  
Sand And Gravel ◽  
Navigation Safety

Floodplain quarries of non-metallic construction materials (NCM) have a minimal impact on the water regime and navigable conditions of the reservoir in the area of their location. However, the development of such deposits has its own characteristics, especially in case of their location in meandering beds of large navigable rivers. On the example of floodplain quarry located at the mouth of the Belaya river (1757-1763 km), development conditions for such facilities based on ensuring navigation safety were considered; on the basis of changes’ dynamics in the bends’ main parameters the channel state assessment and fluvial deformations forecast were made. It was concluded that it is possible to extract sand and gravel in the studied section of the Belaya river, provided that navigation safety issues are resolved in a comprehensive manner. First of all, it refers to meander straightening and transferring the ship's course to a new capital slot.

An ecodesign method application at the experimental stage of construction materials development: A case study in the production of mortar made with ornamental rock wastes

2021 ◽  
Vol 293 ◽  
pp. 123505
Author(s):  
Florence Rezende Leite ◽  
Maria Lúcia Pereira Antunes ◽  
Diogo Aparecido Lopes Silva ◽  
Elidiane Cipriano Rangel ◽  
Nilson Cristino da Cruz
Keyword(s):  
Construction Materials ◽  
Materials Development ◽  
Experimental Stage

scholarly journals Using Satellite Data to Analyse Raw Material Consumption in Hanoi, Vietnam

2021 ◽  
Vol 13 (3) ◽  
pp. 334
Author(s):  
Alessandro Novellino ◽  
Teresa J. Brown ◽  
Tom Bide ◽  
Nguyễn Thị Thục Anh ◽  
Evi Petavratzi ◽  
...  
Keyword(s):  
Satellite Data ◽  
Urban Expansion ◽  
Construction Materials ◽  
Statistical Correlation ◽  
Earth Observation ◽  
Land Conservation ◽  
Raw Material ◽  
Material Consumption ◽  
Sand And Gravel ◽  
Agricultural Areas

In this work, we provide an innovative route for analysing urban expansion and population growth and their link to the consumption of construction materials by combining satellite data with material consumption analysis within the Hanoi Province (Vietnam). Urban expansion is investigated with the use of landcover maps for the period 1975–2020 derived from satellite. During this period, artificial surfaces and agricultural areas have increased by 11.6% and 15.5%, respectively, while forests have decreased by 26.7%. We have used publicly available datasets to calculate and forecast the construction materials consumption and measure its statistical correlation with urban expansion between 2007 and 2018. Our results show that official figures for sand consumption are currently underestimated, and that by 2030, steel and sand and gravel consumption will increase even further by three and two times, respectively. Our analysis uses a new method to assess urban development and associated impacts by combining socio-economic and Earth Observation datasets. The analysis can provide evidence, underpin decision-making by authorities, policymakers, urban planners and sustainability experts, as well as support the development of informed strategies for resource consumption. It can also provide important information for identifying areas of land conservation and ecological greenways during urban planning.

scholarly journals Additive Construction with Mobile Emplacement: Multifaceted Planetary Construction Materials Development

2018 ◽  
Author(s):  
J. Edmunson ◽  
M. R. Fiske ◽  
R. P. Mueller ◽  
H. S. Alkhateb ◽  
A. K. Akhnoukh ◽  
...  
Keyword(s):  
Construction Materials ◽  
Materials Development

Influence des morts-terrains sur l'exploitation des materiaux de construction

1959 ◽  
Vol S7-I (5) ◽  
pp. 493-496
Author(s):  
Antoine Bonte
Keyword(s):  
Adverse Effects ◽  
Carbonate Rocks ◽  
Construction Materials ◽  
Sand And Gravel

Abstract The permeability or impermeability of the overburden is an important factor in the exploitation of construction materials. Examples of carbonate rocks and of sand and gravel occurrences at various localities in France are cited to demonstrate the favorable or adverse effects of alteration, cementation, and other processes associated with downward percolation of meteoric waters.

Nature and Effects of Low-Volume Roads in Botswana

2003 ◽  
Vol 1819 (1) ◽  
pp. 88-95 ◽  
Author(s):  
Bizzar B. Madzikigwa
Keyword(s):  
Rural Areas ◽  
Road Network ◽  
Good Condition ◽  
Construction Materials ◽  
Road Construction ◽  
Rapid Improvement ◽  
The Road ◽  
Low Volume Roads ◽  
Low Volume ◽  
Sand And Gravel

The road sector in Botswana continues to develop its road network throughout the country at a tremendous rate. When Botswana gained independence in 1966, it had only 10 km (16 mi) of bitumen road. By 1992 the total length of bituminous surfaced road reached 3500 km (2,175 mi) out of a total road network of 18 000 km (11,285 mi). These statistics clearly show that the majority of roads are not yet surfaced; these are low-volume roads that provide access to the rural areas where most of the country’s population is found, though in low density. In spite of the rapid improvement in the quality of the national road network in recent years, much remains to be done. In the early 1970s and early 1980s the rural roads unit was introduced in the Ministry of Works Transport and Communications, which was charged with the responsibility of design and construction of low-volume roads around the country in a bid to integrate the country’s road network. This unit was later disbanded in the 1990s, and all roads are improved through the conventional procurement system using private contractors. For these roads the justification of a surfacing project based on conventional economic return methods does not apply, and worse still, the road improvements have to compete with other amenities for the same limited resources. Three ministries in Botswana are responsible for roads: Ministry of Works Transport and Communications, Ministry of Local Government, and Ministry of Trade, Industry, Wildlife and Tourism. These ministries have different responsibilities for different roads within the country, and earth, sand, and gravel roads are found under the jurisdiction of each of the ministries. The major drawbacks concerning low-volume roads in Botswana are inadequate maintenance, poor road construction materials, and the environmental impacts of the roads. Since the budget and resources are inadequate to keep these roads in good condition, it would be prudent to find technological means that would improve the locally available road construction materials so as to minimize their effects on the environment and vehicle operating costs.

scholarly journals Countermeasures for safe navigation of large ships in restricted water

2021 ◽  
Vol 283 ◽  
pp. 02006
Author(s):  
Xie Xingtao ◽  
Liu Xiuwen ◽  
Liu Yongchao ◽  
Luan Xin
Keyword(s):  
Large Scale ◽  
Social Economy ◽  
Considerable Progress ◽  
Safe Navigation ◽  
Wall Distance ◽  
Marine Industry ◽  
Quay Wall ◽  
Navigation Safety

With the development of social economy, my country's marine industry has also made considerable progress, and the trend of large-scale ships has become increasingly obvious. In recent years, people have paid more and more attention to the maneuverability of large ships, especially whether large ships can navigate safely in restricted waters. In order to ensure the navigation safety of large ships in restricted waters, this article analyzes the characteristics of restricted waters and the maneuverability of large ships themselves, and analyzes the causes of some maritime accidents. It points out the navigation risks of large ships in restricted waters and proposes safe navigation. Countermeasures: Reasonably adjust the speed and timing of rudder use; maintain a reasonable quay wall distance; maintain a reasonable draught difference; make careful sailing preparations.

scholarly journals Procedure for the recovery of the mined area in the deposit gravel - sand Rio Sagua, Holguin. Cuba

2014 ◽  
pp. 18-25
Author(s):  
Alexis Montes de Oca-Risco ◽  
Mayda Ulloa-Carcassés ◽  
Suraymi García-Cruz
Keyword(s):  
Building Materials ◽  
Construction Materials ◽  
Mining Activity ◽  
Strong Impact ◽  
Scientific Methods ◽  
Factors Influencing ◽  
The Social ◽  
Gravel Pits ◽  
Sand And Gravel ◽  
Flooded Areas

The gravel pits are exploitations to extract granular materials, sand and gravel in the alluvial river areas. Excavated voids are not very deep, unlike quarries and generally result in flooded areas. The company building materials in Holguin province has concessioned four deposit and within a gravel pit. The areas damaged by the exploitation of construction materials in the territory occupy about 75 ha, which causes a strong impact on the environment. For this reason it is proposed to develop a procedure to recover the deposit mined area in the gravel - sand Rio Sagua de Holguín as to achieve responsible mining. With the application of scientific methods analyzed the factors influencing the choice of recovery uses the mined area in the study area and developed a procedure consisting of five main stages. With the development of the procedure was shown that it can improve the social and environmental quality in the area affected by the mining activity.

scholarly journals The analysis of the channel deformations in the lower pool of the Votkinsk reservoir

2020 ◽  
Vol 163 ◽  
pp. 06005
Author(s):  
Svetlana Dvinskikh ◽  
Dmitriy Klimenko ◽  
Olga Larchenko ◽  
Konstantin Minkin
Keyword(s):  
Discharge Rate ◽  
Water Discharge ◽  
Lower Pool ◽  
Hydroelectric Station ◽  
Hydrological Regime ◽  
Growth Cycle ◽  
Low Flow ◽  
Channel Deformations ◽  
Sand And Gravel

The sand and gravel mix is mined at the Votkinsk reservoir. This leads to horizontal and vertical channel deformations. To study them, we examined the Golyanovsk section of the sand and gravel mix (SAGM) field in the lower pool of the reservoir. We used the channel surveys made in 2012-2016, 2018 and 2019 as the source of cartographic materials. The lower pool section of the Votkinsk hydroelectric complex, within which the Golyanovsk SAGM field is located, is characterized by a fully regulated effluent and an unsteady hydrological regime. Therefore, the hydrological regime of the considered area is particularly complex and depends on the water consumption in the alignment of the Votkinsk hydroelectric station and the level of the Nizhnekamsk reservoir. The average long-term water discharge for the navigation period is 2200 m3/s, the average long-term minimum monthly discharge rate is 1800 m3/s. The field survey of the area was carried out during the low water period in accordance. This period was characterized by minimum levels at around 64.79-65.24 m BS. The water discharge varied between 1720-1780 m3/s. With this flow, the Kama River is characterized by fairly low flow speed: no more than 1.29 m/s on the rod and 0.2-0.5 m/s on the riverbank shallows. The channel deposits are represented by pebble-gravel soils of various sizes. Throughout 2001-2019 an increase in the particle size has occurred. This is due to the change of the channel-forming process from accumulation to erosion. Horizontal deformations are represented by the reformation of the riverbanks, vertical – by accumulation and erosion of bottom. Drawdown levels are the result of natural deformations of the channel. According to the monitoring data, the duration of the “drawdown – growth” cycle is 2-3 years. The duration of the “drawdown – growth” cycle is 2-3 years.

Construction materials development in sulfur–iodine thermochemical water-splitting process for hydrogen production

2007 ◽  
Vol 32 (4) ◽  
pp. 497-504 ◽  
Author(s):  
B. Wong ◽  
R.T. Buckingham ◽  
L.C. Brown ◽  
B.E. Russ ◽  
G.E. Besenbruch ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Construction Materials ◽  
Materials Development ◽  
Splitting Process
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