การศึกษาการใช้แร่แอนไฮโดรต์ในการปรับปรุงคุณภาพดินเหนียวอ่อนกรุงเทพฯ ในห้องปฏิบัติการ

The Study of Anhydrite Stabilization Bangkok Soft Clay in Laboratory

Name: ชาญฤทธิ์ ปุ่นนิ่ม

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: ดินเหนียวอ่อนกรุงเทพฯ

; แร่แอนไฮไดร์ด

Abstract: Anhydrite is a residue from gypsum mining. The objective of this study is to take ailhydrite to stabilize Bangkok soft clay by making more shear strength. Anhydrite used in study alcell from gypsum mining of The Siam Cement Public Company Limited at amphae Doungiaroen, Pichit provinee. Physical and engineering properties of clay, standard compaction and california bearing ratio test (CBR) of anhydnte stabilized Bangkok soft clay when using percent of anhydrite per soft clay as 596, lo%, 15% and 20% by weight were investigated. CBR uses Standard compaction and consists of unsoaked CBR type at curing time 7 and 14 days and soaked CBR type at curing time 3 days before soaking at 4 days for swelling test, total curing time as 7 days. Unconfined compressive strength test of anhydrite stabilized Bangkok soft clay with percent of anhydrite per soft clay as CBR test which with admixture and no admixture at curing time 1, 3,7, 14 and 28 days. The results of standard compaction test show that at percent of anhydrite per soft clay as 5% by weight, the maximum dry density is lower than soft clay, in the other hand, at percent of anhydrite per soft clay as lo%, 15% and 20% by weight, the maximum dry density is higher than soft clay. The result of optimum moisture content is higher than soft clay at percent of anhydrite per soft clay as lo%, 15%, and 20% by weight, While an optimum moisture content lower than soft clay. The resuits of CBR test show that %CBR value of anhydrite stabilized soft clay increase as the amount of curing time increase. CBR test show that at percent of anhydrite per soft cIay as 5% and 10% by weight CBR values are lower than pure soft clay, in the other hand, at percent of anhydrite per soft clay as 15% and 20% by weight, CBR values are higher han pure soft clay and at anhydrite per soft clay as 15% by weight CBR value is the most ~naximcin. The 'result of swelling test show that the swell of soil specimen decrease as the amount of compaction energy increase. The result of unconfined compressive strength for anhydrite stabilized soft clay which no admixture show that at percent of anhydrite per soft clay us 5(%1 and 10% by weight an undrained shear strengths (Su) are lower than pure soft clay. At percent of anhydrite per soft clay as 15% and 20% by weight, an undrained shear strengths (Su) are higher than pure soft clay and at percent of anhydrite per soft clay as 15% by weight, an undrained shear strength (Su) is maximum. The result of unconfined compressive strength for anhydrite stabilized soft clay which with admixture show that an undrained shear strength (Su) are higher when pluss admixture to soil specimen. At percent of anhydrite per soft clay as 5% by weight an undrained shear strength is nearly equal pure soft clay and at percent of anhydrite per soft clay as lo%, 15% and 20% by weight an undrained shear strength are higher than pure soft clay. In this study can be summarized that the most suitable percent of anhydrite per soft clay for stabilize is 15% by weight .

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: ภาณุวัฒน์ สุริยฉัตร

Role: อาจารย์ที่ปรึกษา

Created: 2543

Issued: 2007-01-29

Modified: 2008-06-04

วิทยานิพนธ์/Thesis

CallNumber: CVE1416

tha

eng

DegreeName: ประกาศนียบัตรบัณฑิต

Level: ประกาศนียบัตรบัณฑิต

Descipline: วิศวกรรมโยธา

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

©copyrights King Mongkut's University of Technology Thonburi

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1	CVE1416.pdf	3.62 MB	38	2024-09-20 13:25:26
2	CVE1416ab.pdf	87.64 KB	19	2019-02-12 15:55:26
3	CVE1416ab.txt	3.15 KB	8	2018-06-05 10:13:00

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