scholarly journals Classification and Disintegration Characteristics of the Carboniferous Rocks in Guangxi, China

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Peng Mo ◽  
Junhui Luo ◽  
Decai Mi ◽  
Zhenchao Chang ◽  
Haifeng Huang ◽  
...  
Keyword(s):  
Clay Content ◽  
Test Results ◽  
Structural Form ◽  
Guangxi Province ◽  
Clay Shale ◽  
Mineral Compositions ◽  
Disintegration Index ◽  
Carbonaceous Rocks

To investigate the disintegration characteristics of the carbonaceous rocks in Guangxi Province, the typical carbonaceous rocks in the section exposed by the Hechi-Baise Expressway were investigated in this study. First, based on their mineral compositions and contents, the carbonaceous rocks were divided into four types: carbonate chert, carbonaceous argillaceous limestone, carbonaceous illite clay mudstone, and carbonaceous illite clay shale. Then, through indoor wet-dry cyclic disintegration test, the disintegration characteristics of the four types of rocks were studied. The test results showed the following: (1) the disintegration residues of the carbonate chert and the carbonaceous argillaceous limestone decrease linearly as the number of wetting-drying cycles increases. (2) The disintegration index of the carbonaceous illite clay mudstone and the carbonaceous illite clay shale decreases exponentially as the number of wetting-drying cycles increases. (3) As the number of wetting-drying cycles increases, the disintegration index curves of the carbonaceous illite clay mudstone and the carbonaceous illite clay shale samples gradually become stable until the disintegration of the samples is completed. (4) The disintegration of carbonaceous rocks is mainly affected by the clay content, followed by the structural form, but it cannot be ignored.

PETROPHYSICS OF THE COOPER BASIN, SOUTH AUSTRALIA

1972 ◽  
Vol 12 (1) ◽  
pp. 23
Author(s):  
Chris R. Porter ◽  
Hugh Crocker
Keyword(s):  
Water Saturation ◽  
South Australia ◽  
Clay Content ◽  
Computer Applications ◽  
Test Results ◽  
Upper Limits ◽  
Porosity And Permeability ◽  
Log Interpretation ◽  
Logging Tool ◽  
Cooper Basin

In the Cooper Basin lithologic types can be recognised and related to logging tool response. Empirical relationships between log readings and porosity and permeability can be developed locally by comparing log readings with core data. Water saturation/porosity relationships are found to be convergently hyperbolic. The effects of clay minerals upon water saturation determination show that only in the low porosity range is correction for clay necessary.A plot of Sw versus Sxo allows prediction of probable test results and has been confirmed by actual Cooper Basin well tests.An attempt to relate clay content to permeability has been successful in estimating tentative upper limits of permeability. Computer applications to log interpretation are utilized in achieving petrophysical parameters.

ANALYSIS OF THE MINERAL COMPOSITIONS OF SWELL-SHRINK CLAYS FROM GUANGXI PROVINCE, CHINA

2020 ◽  
Vol 68 (2) ◽  
pp. 161-174
Author(s):  
ZHAOTIAN ZENG ◽  
HAIBO LU ◽  
YANLIN ZHAO ◽  
YINGHONG QIN
Keyword(s):  
Guangxi Province ◽  
Mineral Compositions

scholarly journals Investigation of the Mechanical Behavior of Partially Precast Partially Encased Assembled Composite Beams

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Liufeng Zhang ◽  
Yinghua Yang
Keyword(s):  
Mechanical Properties ◽  
Composite Beam ◽  
Low Cost ◽  
Concrete Strength ◽  
Composite Beams ◽  
Test Results ◽  
Structural Form ◽  
Heavy Load ◽  
Grade Steel ◽  
Good Agreement

In view of the characteristics of a high floor and the heavy load of logistics buildings, a partially prefabricated partially encased assembled composite beam (PPEC) is proposed in order to achieve the low cost construction of such buildings. In this research, the mechanical properties of PPEC beams were studied experimentally. The effects of the concrete strength grade, steel content, shear span ratio, and fabrication methods on the mechanical properties of the PPEC beams were analyzed. The results showed that the proposed structural form of the PPEC beams was generally feasible. Based on the test results, a practical shear formula for PPEC beams was proposed, and the calculated results were in good agreement with the test results.

Research on the Relationship between Clay Content in Aggregate and Water Stability of Rubber Asphalt Mixture

2013 ◽  
Vol 639-640 ◽  
pp. 346-349
Author(s):  
Zhao Bin Xie
Keyword(s):  
Significant Influence ◽  
Asphalt Mixture ◽  
Clay Content ◽  
Water Stability ◽  
Test Results ◽  
Road Engineering ◽  
Stability Performance ◽  
Speed Up ◽  
The Relationship

In order to verify the characterization degree of water stability, research selects some clay content aggregate retrieved from road engineering field to produce rubber asphalt mixture and carry out the water stability test. Test results show that clay content in aggregate has a significant influence on the water stability of rubber asphalt mixture. When the content of clay in aggregate less than 1%, the influence on water stability is smaller; when the clay content exceeds 2%, the decay rate on water stability performance and long term properties obviously speed up, resulted in serious water damage.

Experimental Study on First Flush Effects of Storm-Runoff on Slope Field

2013 ◽  
Vol 811 ◽  
pp. 266-272
Author(s):  
Shu Fen Chen ◽  
He Li Wang ◽  
Jing Liu ◽  
Xiang Rui Kong
Keyword(s):  
Soil Erosion ◽  
Clay Content ◽  
Size Composition ◽  
Storm Runoff ◽  
First Flush ◽  
Test Results ◽  
Artificial Rainfall ◽  
Rest Time ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Precipitation runoff is the main driving factor which leads to soil erosion and nutrient transfer. In the experiment, an artificial rainfall simulator was used to study the migration amount of organic matter, nitrogen, phosphorus and potassium, volume of the soil erosion and its particle size composition in the earlier runoff, under a certain condition of rainstorm intensity and different slopes. The test results show that the migration amount of nitrogen, phosphorus, potassium, etc. is more than 70% of the respectively total loss in the first 30 minutes of runoff. Under different slope conditions, clay content in the runoff sediment within the first ten minutes is more than subsequent 10min and the rest time. According to the test results, under different slope conditions, there are obvious initial flushing effects of storm-runoff.

scholarly journals Kajian Ketahanan Batuan Clay Shale Formasi Jatiluhur di Sentul City Jawa Barat

PROMINE ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 26-32
Author(s):  
Revia Oktaviani ◽  
Paulus P Raharjo ◽  
Imam A Sadisun
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Test Results ◽  
Durability Test ◽  
Indirect Contact ◽  
Water Research ◽  
Clay Shale ◽  
High Durability ◽  
Slake Durability Test ◽  
Over Time

The mechanical properties of Clay Shale are very unique. When it is dry, it shrinks and hardens, butwhen it absorbs water, it swells and to some extent loses its shear strength so that the drop-instrength can occur suddenly even with its own weight. Due to the nature of the swell-shrink that arestrongly influenced by climate and weather, clay shale durability may decrease over time when indirect contact with air and water. Research on clay shale was done in Sentul City, Bogor - West Java,Indonesia on Jatiluhur formation, using dynamic slaking (slake durability test) and slaking static test.Dynamic slacking test is done in three times i.e. after sampling, after 3 months and after 9 months.Slake durability test results from 3 different drilling points, shows that within 9 months, has not seenthe decreasing effect of durability. With a low Plasticity index, the durability research in Sentul City isin medium durability to medium-high durability classification.

Influence Mechanism of Lime on Strength and Water-Resistance Properties of Phosphogypsum Autoclaved Brick

2012 ◽  
Vol 204-208 ◽  
pp. 1492-1498 ◽  
Author(s):  
Yang Lin ◽  
Jian Xin Cao ◽  
Qian Lin
Keyword(s):  
Thermal Analysis ◽  
Phase Composition ◽  
Water Resistance ◽  
Sem Analysis ◽  
Maximum Strength ◽  
Test Results ◽  
Slag Powder ◽  
Influence Mechanism ◽  
Mineral Compositions ◽  
Phosphorous Slag

Influence mechanisum of lime on the strength and water-resistance properties of phosphogypsum autoclaved brick is exploited for the manufacture of preparing phosphogypsum autoclaved brick. Results of XRD and SEM analysis of phosphogypsum and phosphorous slag powder, influence of lime on the properties of phosphogypsum autoclaved bricks, phase composition, microstructure and thermal analysis of phosphogypsum autoclaved bricks with different lime content, and influence mechanisum of lime on the strength and water-resistance properties development have been discussed. The test results reveal that (a) when the dosage of lime is zero, the major mineral compositions of the autoclaved bricks are CaSO4 and SiO2, thus the strength and water-resistance properties of the bricks are poor, (b) optimum lime to phosphorous slag powder and phosphogypsum ratio yielding maximum strength and Softness coefficient is about 0.03, (c) excess lime beyond the optimum limit (in this case 5%) can remain unreacted and act as weak filler in the phosphogypsum autoclaved bricks leading to reduction in strength and water-resistance properties.

Mechanical Behavior of Hybrid Glass Fibre/Epoxy Clay Nanocomposites

2014 ◽  
Vol 894 ◽  
pp. 336-341 ◽  
Author(s):  
Ahmad Rafiq ◽  
Muneer Al-Qadhi ◽  
Nesar Merah ◽  
Yasir Ali
Keyword(s):  
Fracture Toughness ◽  
Glass Fiber ◽  
Clay Content ◽  
Clay Nanocomposites ◽  
Test Results ◽  
Water Pipe ◽  
Fiber Mats ◽  
Corrosion Resistant ◽  
Glass Fiber Reinforced ◽  
Shear Mixing

Addition of organoclay to polymer matrix has recently attracted industry attention due to improved physical properties with an overwhelming potential in crude oil and water pipe applications. In this work, electrical grade-corrosion resistant (E-CR) glass fiber mats were used to prepare glass fiber reinforced epoxy (GFRE) nanoclay composites using hand layup method. Three different hybrid GFRE composites were made using 0, 1.5 and 3 wt% loading of I.30E nanoclay. High shear mixing was used to prepare the epoxy/clay nanocomposite. XRD results revealed a disordered intercalated morphology. The effect of nanoclay on mechanical properties were investigated by carrying out flexural and fracture toughness tests. The test results showed that addition of nanoclay up to 1.5 wt% improved both flexural strength and fracture toughness. However, these properties deteriorated when the clay content increased to 3 wt%.

Test Study on Support Span of Sheet Sandwich Structure of Steel Fiber Concrete

2011 ◽  
Vol 94-96 ◽  
pp. 1386-1390
Author(s):  
Ming Shan Wei ◽  
Jin Ji Feng ◽  
Hai Cao ◽  
Ya Qi Ye
Keyword(s):  
Sandwich Structure ◽  
Steel Fiber ◽  
Layer Structure ◽  
Test Results ◽  
Structural Form ◽  
Failure Characteristics ◽  
Test Study ◽  
Steel Fiber Concrete ◽  
New Type ◽  
Fiber Sheet

The layer structure is a common structural form in the civil air defence. According to the shortage of the structure, a new type of structural form called steel fiber sheet sandwich structure is setup. For studying the influence caused by the support span of this structural form on structural blast-resistant ability, this paper has carried out a group of explosion model tests, which studies the optimal support span of this structure form and the influence on the failure characteristics of structure induced by the change of the support span. The test results show that: the support span of the steel fiber sheet is a very important factor for improving the whole structural blast-resistant ability; the thickness and support span of Steel fiber sheet shall make the steel fiber sheet not to reach the roof surface under the loads of explosion; the whole resistance of sheet sandwich structure in the tests is obviously higher than that of ordinary layer structure.

Heave of Spillway Structures on Clay Shales

1963 ◽  
Vol 1 (1) ◽  
pp. 5-15 ◽  
Author(s):  
R Peterson ◽  
N Peters
Keyword(s):  
Laboratory Tests ◽  
Western Canada ◽  
Test Results ◽  
Paper Briefly ◽  
Clay Shale ◽  
Frost Action ◽  
Existing Structures ◽  
Clay Shales ◽  
Spillway Structures

Construction of spillways on clay shale in Western Canada has resulted in some serious heave problems. This paper briefly describes the clay shales of the area and gives typical laboratory swelling test results. It has not yet been possible to predict total heave and rate of heave from laboratory tests. Observational programs to check the performance of existing structures as well as special tests were undertaken to provide information required for design. Typical heave observations at spillways showing the effect of seepage, frost action, and hold-down piles are included.

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