Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new usereffect of the soil content of gypsum on its compression and stabilization
تأثير محتوى التربة من الجبس على انضغاطيتها و تثبيتها
3008
8 282
0
(
0
)
Authors
علي العبدالله( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
يهدف البحث إلى دراسة تأثير محتوى التربة من الجبس على خصائصها الهندسية و على قابميتها للانضغاط . تم دراسة تأثير زيادة نسبة الجبس في التربة على قيم حدود آتربرغ , و تبين أن زيادة نسبة الجبس في التربة يقلل من لدونتها . تم دراسة تأثير محتوى التربة من الجبس على قابلية التربة للانتفاخ و تبين أن قابلية التربة للانتفاخ تنخفض مع زيادة نسبة الجبس كما أن قيمة ضغط الانتفاخ تنخفض أيضاً بزيادة محتوى التربة من الجبس . و في إطار معالجة قابلية التربة الجبسية للانضغاط تم دراسة تأثير خلط التربة الجبسية بالإسمنت على قابميتها للانضغاط , و تبين أن إضافة الإسمنت للتربة الجبسية يقلل من قابلية للهبوط فيها .
The research aims to study the effect of soil content of gypsum on the Engineering Characteristics and the usability of compression. The effect of increasing the proportion of gypsum in the soil on the Atrberg limits values was studied, and found that an increase in the proportion of gypsum in the soil reduces the Plasticity. The effect of the gypsum content on the Swelling Capability for soil was studied and found that the swelling ability reduces with increasing the proportion of gypsum and the swelling pressure value also decreases with increasing the soil content of gypsum. It was studied The effect of mixing gypsum soil - cement on the usability of compression, and found that the addition of cement to the soil reduces the usability of compression.
References used
(Abduljauwad et al., 1999. Effect of Phase Transformation of Calcium Sulfate on the Volume Change Behavior of Calcareous Expansive Soil. (ASCE-SAS), vol.1,pp(209-218
Al Mohammadi, N.M., Nashat, H.J. and Boko, G.Y. (1987) – Compressibility and Collapse of Gypseous Soils, Prov. 6th Asian Conference Soil Mechanics, Tokyo
Arakelyan, E.A. (1986) – Characteristics of Determination of the Physical Properties of Gypsum Soils, Soil Mechanics and Foundations Engineering, Vol. 23, No.1, pp. 27-29
rate research
Read More
The reasearch was carried out during 2009 – 2010 in Al – Hasaka – Amoda - to study
the effect of cattle manure at the rat of 30 ton / ha , and four organic green manure ( Lentil,
Vetch, Faba bean and Barely) on soil content of organic matter and so
me mineral elements
compared with chemical fertilizer 400 kg / ha urea , 83 kg / ha P2O5 and 25 kg / ha K2O .
The manure significantly increased organic matter , phosphorus and potassium
concentrations compared with other fertilizers ( chemical and green fertilizers ) . All green
fertilizers ( Lentil , Vetch , Faba bean and Barely ) significantly increased organic matter ,
nitrogen and potassium concentration compared with the control without using any
fertilizer , the tillage depth ( 0 – 10 ) cm significantly increased soil content of organic
matter and nitrogen compared with deeper tillage ( 25 – 30 ) cm during the two seasons .
This paper aims at investigating the effect of organic matter
content on the engineering properties of the soil.
The effect of the organic matter on both the consistency limits and strength have been investigated. The results show that the organic
matter increases both the plasticity and the strength of soil.
Mathematical formula is presented in which the unconfined
compression strength of the soil is related to the organic matter
content. It was concluded that increasing the organic matter
content increases the displacement corresponding to the maximum shear stress. In addition, the effect of the organic matter has been studied and the results show that the organic matter increases the compressibility of the soil.
Stabilizing the soil with cement has been investigated as well. The
results show that adding the cement to the soil improves the
strength of the soil and decreases its swelling potential.
Depending on the organic matter content, a mathematical formula
is presented to determine the required cement ratio to treat the
soil to decrease its swelling potential.
This research is done in an experiment by plaster in the
circumstances of Homs. The aim of this paper to study the effect of
adding four different levels of phosphogypsum as much as (0.00,
6.72, 13.44, 20.16)ton / hectare (three replicates for eac
h treatment)
on bulk density and structure stability for clay soil has taken from
(Kattina).
The results showed improvement in the stability of the structure of
soil specially (0.25-1)mm, increasing in aggregation degree ,
increasing of the rate of total porosity ,air filled porosity in
comparison to the control at the two levels(13.44, 20.16)ton/hectare
and also by increasing the added level . Whereas the dispersion
ratio , and Bulk density were decreased when increasing the level
of phosphogypsum at the same two levels.
The main achieved results in this study showed , a significant
increase in aggregation degree in the soil when increasing the ratio
of the added phosphogypsum at the levels( 6.72, 13.44, 20.16) in
comparasion with control .
In other way the dispersion ratio was decreased and had negative
relationship when increasing the level of the added
phosphogypsum in comparasion with control .
A research was carried out at Al-Sanouber research station in
Lattakia in 2013/2014 season ,The research included six treatments
with four replicates for each treatment. Six treatments used of
OMWW (0 , 10 , 20 , 30 , 40 , 50) l/m2. The OMWW has b
een
added 40 days before planting. Samples of soil have been taken
before adding OMWW, then after one and two months from
planting, and at the end of the season in order to make some
physical and chemical analysis and also to know the concentration
of some micro elements .
The study was carried out to comparison between of of three controlling treetments,
of soil-borne fungi in greenhouses. The treetments were as follows: An treeted control,
Formalin 3%, soil Solarization + animal manur and solarization for 50 days, and 0 , 5, 10
,15 and 20 cm depth.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
