International journal of GEOMATE : geotechnique, construction materials and environment 

About: International journal of GEOMATE : geotechnique, construction materials and environment is an academic journal. The journal publishes majorly in the area(s): Bearing capacity & Settlement (structural). It has an ISSN identifier of 2186-2982. It is also open access. Over the lifetime, 81 publications have been published receiving 497 citations.

Removal of Copper from Water by Adsorption onto Banana Peel as Bioadsorbent

Abstract: Banana peel, a fruit waste were used to produce bioadsorbent through environment friendly process. It were cut, washed, dried, grounded into powder and used for copper removal. Copper adsorption onto banana peel was depended upon the controlling parameters such as particle size, doses, pH, contact time, agitation speed and temperature. Slightly acidic water (pH = 6) was found to be suitable for copper removal. Equilibrium data were well fitted (R 2 = 0.998) with the Langmuir and Freundlich isotherms. The monolayer adsorption capacity was 27.78 mg/g. The calculated RL and 'n' values has proved the favorability of copper adsorption onto banana peel. Copper adsorption was followed the second order kinetic properly rather than other models. The equilibrium adsorption capacity was 1.439, 8.849, 18.182, 31.250 and 71.429 mg/g when initial copper concentrations were 10, 50, 100, 200, and 400 mg/l respectively. Solvent 0.1N Sulphuric acid showed higher desorption of copper (94%) and adsorption-desorption process can be continued till seven cycles efficiently.

Design of Single Piles Using the Mechanics of Unsaturated Soils

Abstract: The load carrying capacity of single piles are commonly estimated using the well known  (1),  (2-3) and (4) methods. These methods are also used in engineering practice for unsaturated soils even though the ,  and  methods are based on conventional saturated soil mechanics. In this study, a series of single model pile tests were conducted in a laboratory environment to study the influence of matric suction on the pile shaft capacity in a statically compacted fine-grained soil. The results of the study show that the shaft capacity of single piles is significantly influenced by the contribution of matric suction. Based on the experimental results, the conventional ,  and  methods were modified to estimate the total shaft resistance of piles in unsaturated soils by including the influence of matric suction. The modified methods can also be used for estimating the variation of shaft capacity of single piles with respect to matric suction using the Soil-Water Characteristic Curve (SWCC) and the saturated soil shear strength parameters. The modified ,  and  methods are promising for use in engineering practice to estimate the ultimate shaft bearing capacity of single piles placed in unsaturated soils.

Bearing capacity and settlement of footings in unsaturated sands

Abstract: The focus of the study in this paper is directed towards understanding the influence of three parameters; namely, (i) matric suction, (ii) overburden stress, and (iii) dilation, on the bearing capacity and settlement behavior of surface and embedded model footings in unsaturated sands. The results show that the bearing capacity and settlement behavior of unsaturated sands are significantly influenced by all the three parameters. In addition, comparisons are provided between the predicted and measured bearing capacity and estimated and measured settlement values using the proposed modified Terzaghi's equation and modified Schmertmann's CPT-based method, respectively. There is a good comparison between the predicted/estimated and measured bearing capacity and settlement values for the laboratory and field tests using the proposed modified methods.

Performance of automatic control different localized irrigation systems and lateral lengths for : 1-emitters clogging and maize (zea mays l.) growth and yield

Abstract: Many parts of the world including Egypt currently suffer from water scarcity. For this reason optimization of the available water has become a necessity not only from the point of limited water resources, but also relative to the growing demand for food. Field experiments were conducted at Experimental Farm of National Research Center, El-Nubaria, El-Buhaira Governorate, Western Delta, Egypt to study the effect of automatic control of the localized irrigation system(LIS) as a modified system on emitter's clogging and maize parameters in new reclaimed lands by using the following treatments: a) Bubbler irrigation systems (B); b) Low head drip irrigation system (LHD), and c) Mini-sprinkler irrigation system (MS) through different lateral lengths (40, 50; 60m). Plants were irrigated every 4 days to compensate ETc and salt leaching requirement took place. The obtained data showed that emitter's clogging percentage could be ranked in the ascending orders: LHD

Lime leachability studies on stabilized expansive semi-arid soil

Abstract: The present study is aimed at examining the role of lime and the nature of leaching solution on the lime leaching characteristics of an expansive soil originating from the Kingdom of Saudi Arabia. Lime leachability studies were carried out in specially fabricated molds subjected to continuous leaching conditions. The specimens were compacted directly into specially fabricated perspex molds and cured for 7, 14 and 28 days under constant humidity conditions. In order to study the rate at which the calcium ions leach out from the lime treated clay matrix, water (leaching solution) was allowed to flow through the compacted specimen continuously for seven days and the resultant calcium concentration in the leachate was determined. The effects of various parameters like lime content, curing period and the pH of leaching solution on the lime leachability values has been studied. It is observed that, at a given lime content, the calcium concentration in the leachate reduces with curing period. Relatively higher amounts of lime leached under acidic conditions and the flow period does not affect the lime leaching patterns.