scholarly journals Analisis Ionic Soil Stabilizer (Iss 2500) Terhadap Nilai Durabilitas Tanah Lempung Plastisitas Rendah Pada Perkerasan Jalan

CIVED ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 94
Author(s):  
Amelia Oktavia ◽  
Idharmahadi Adha ◽  
Setyanto Setyanto
Keyword(s):  
Quality Improvement ◽  
Road Construction ◽  
Chemical Solution ◽  
Temperature Changes ◽  
Soil Particles ◽  
Soil Stabilizer ◽  
Cbr Test ◽  
Laboratory Results ◽  
Soil Quality Improvement ◽  
Additive Materials

Various methods of soil stabilizations in Indonesia are more increasingly used for soil quality improvement, one of the methods is using chemically additive materials with ISS 2500 (Ionic Soil Stabilizer). This chemical solution is able to cover soil particles through electro-chemical reactions, so that the water content is separated and cohesion among soil particles is strengthened. However, unstable weather and temperature changes (durability) in forms of rainfall and heat influence and cause soil defects especially in road construction. In this reseach, the tested soil was clay with low plasticity from Karang Anyar region in Lampung Selatan regency, and mixed with 0.9 ml of ISS 2500 solution content the ISS optimum content. To enable reactions between soil and ISS 2500, the mixed soil was treated in 18 days with durability treatment and cycles addition; 0,2,4, and 6 cycles. The laboratory results indicated that CBR test in cycle 0, 2, 4, and 6 obtained 8%, 7.6%, 5.7%, and 5.1% respectively.  The CBR value of the mix decreased regularly along with given amounts of additional cycles. However, the overall CBR value of the stabilization of low plasticity clay with an ISS of 2500 (Ionic Soil Stabilizer) can meet the requirements of Bina Marga as subgrade, because the CBR value obtained is greater than 5% even though it is given cycle treatment. The ISS 2500 material can be used as an alternative stabilization material for the improvement of the subgrade.

scholarly journals Study on the Stabilization Mechanisms of Clayey Slope Surfaces Treated by Spraying with a New Soil Additive

2019 ◽  
Vol 9 (6) ◽  
pp. 1245 ◽  
Author(s):  
Cuiying Zhou ◽  
Shanshan Zhao ◽  
Wei Huang ◽  
Dexian Li ◽  
Zhen Liu
Keyword(s):  
Organic Polymer ◽  
Molecular Volume ◽  
Water Stability ◽  
Infiltration Depth ◽  
Infiltration Process ◽  
Soil Particles ◽  
Soil Stabilizer ◽  
Polymer Stabilizer ◽  
Infiltration Tests ◽  
Clayey Slope

The topsoil of a clayey slope is easily washed off by rain due to its loose structure. To protect the slope surface, in recent years, several types of non-traditional soil additives have been used by means of mixing with soil. In this work, a new organic polymer soil stabilizer, named aqua-dispersing-nano-binder (ADNB), was sprayed on the soil surface to stabilize the topsoil of a clayey slope. To understand the interaction between the polymer and soil particles during the infiltration process as well as the stabilization mechanism, infiltration tests, water stability tests and scanning electron microscopy (SEM) analyses were performed with different polymer contents. The infiltration tests showed that the infiltration rate of the polymer stabilizer in the soil was slower than that of water due to its characteristics of easy adhesion to soil particles, poor fluidity and large molecular volume. The maximum effective infiltration depth was achieved in the specimen treated with 2% ADNB, and the minimum was achieved in the specimen treated with 5% ADNB. The water stability of the soil increased with the content of the soil stabilizer in the soil aggregates with diameters of either 5–10 mm or 10–20 mm. The SEM analysis showed that the quantity of polymer decreased with infiltration depth; a polymer membrane was formed on the surface of the topsoil and chains were formed inside. The amelioration of the soil water stability may have been due to the bonding between soil particles and polymers generated after evaporation of water in the emulsion. The polymer stabilizer could be applied to improve the erosion resistance of the slope topsoil and reduce soil loss.

Strategies for Improving the Productivity of Rainfed Farms in India with Special Emphasis on Soil Quality Improvement

2009 ◽  
Vol 23 (4) ◽  
pp. 430-450 ◽  
Author(s):  
K. L. Sharma ◽  
Y. S. Ramakrishna ◽  
J. S. Samra ◽  
K. D. Sharma ◽  
U. K. Mandal ◽  
...  
Keyword(s):  
Quality Improvement ◽  
Soil Quality ◽  
Soil Quality Improvement

FACTORS AFFECTING LARVAL DIAPAUSE IN DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE)

1977 ◽  
Vol 109 (11) ◽  
pp. 1485-1490 ◽  
Author(s):  
E.D.A. Dyer ◽  
P.M. Hall
Keyword(s):  
Life Cycle ◽  
Larval Development ◽  
Larval Instar ◽  
Fourth Instar ◽  
Dendroctonus Rufipennis ◽  
Factors Affecting ◽  
Temperature Changes ◽  
Larval Diapause ◽  
Laboratory Results ◽  
Development Threshold

AbstractThe effect of daily day-degrees C in relation to brood age was investigated to determine its influence on the induction of larval (prepupal) diapause in Dendroctonus rufipennis (Kirby). Daily day-degrees of less than about 9° above the development threshold (6.1°C) induced diapause in most of the broods while diapause was averted by daily day-degrees C of 10 or more above the threshold. Induction of diapause occurred no later than third larval instar; temperature changes during the fourth instar produced no change in aversion or induction of diapause. Laboratory results reveal that field temperatures during larval development determine whether most beetles have a 1- or 2-year life cycle.

scholarly journals Dental alginate impression waste as additional fertiliser for plant yields and soil quality

2018 ◽  
Vol 30 (1) ◽  
pp. 12
Author(s):  
Tommy Frahdian ◽  
Zulia Hasratiningsih ◽  
Elin Karlina ◽  
Diyan Herdiyantoro ◽  
Veni Takarini
Keyword(s):  
Quality Improvement ◽  
Soil Quality ◽  
Soil Ph ◽  
Block Design ◽  
Control Group ◽  
Impression Material ◽  
Soil Quality Improvement ◽  
Plant Yields

Introduction: Dental alginate impression material is the most common material used in dentistry. However, dental alginate waste (DAW) is one of the causes of the increasing number of dentistry and medicinal wastes. This research was aimed to discover the effect of dental alginate impression waste as additional fertiliser on the plant yields by determining the weight of cauliflower crop, and towards the quality of soil by determining the soil pH (Ultisol® Jatinangor). Methods: The experiment was using a randomised block design with 4 treatments and 7 times replications. The treatment consisted of A0 (0% DAW as control), A1 (0.01% DAW), A2 (0.1% DAW), and A3 (1% DAW). Results: The weight of cauliflower after addition of DAW in group A0 was 72.78; A1 was 139.82); A2 was 130.69; and A3 was 60.72). While the pH soil in group A0 was 5.92; A1 was 6.07; A2 was 6.02; and A3 was 6.26. The treatment in the A1 and A2 groups were found as the significant doses that able to increase the cauliflower weight for consecutively 1.92 times and 1.80 times compared to the control group, while on the soil quality improvement (soil pH), the addition of DAW was not significantly affected. Conclusion: It can be concluded that the addition of dental alginate waste at the dose of 0.01% and 0.1% increased the weight of cauliflower, but has no significant effect on the soil quality.

scholarly journals PENGELOLAAN AIR, BAHAN ORGANIK DAN VARIETAS ADAPTIF UNTUK MENINGKATKAN HASIL PADI DI LAHAN RAWA PASANG SURUT

2017 ◽  
Vol 16 (1) ◽  
Author(s):  
Koesrini Koesrini ◽  
Khairil Anwar
Keyword(s):  
Water Management ◽  
Organic Matter ◽  
Quality Improvement ◽  
Rice Yield ◽  
Iron Toxicity ◽  
Management Control ◽  
Rice Varieties ◽  
Tidal Swamp ◽  
Soil Quality Improvement ◽  
Plot Design

Iron toxicity is a factor causing low rice yield on tidal swamp land (TSL).Soil quality improvement by using water management, organic matter and introducing adaptable varietywere some options to increaseits productivity in the soils. Field experiment was conducted to  evaluate effects of applying water management, organic matter and adaptable variety to increase its productivity on a TSL of KP Belandean, Barito Kuala District of South Kalimantan, during dry season of 2010. The research was arranged in a split-split-plot design with three  replicates. The main plots were two water management, i.e: P0 = without water management (control) and P1= intermittent water management, while sub plots were three organic matter application, i.e: B0 = without organic matter application (control), B1 = straw  compost 3 t/ha, B2 = manure 2 t/ha, and sub sub plots were five rice varieties, i.e. V1 = Mekongga, V2 = Inpari 1, V3 = Ciherang, V4 = Silugonggo and V5 = Margasari. The result showed that there was interaction between water management and variety tested on rice yield in TSL. The highest yield was reached by Inpari 1 variety which treatment intermitten water management, with  yield i.e. 5.390 t/ ha.Silugonggo and Ciherang was not suitable to cultivate on TSL. The implication of this research was variety recomendation on a tidal swamp land, i.e. Inpari 1 variety and intermitten water management. 

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