بررسی خواص مکانیکی ماسه تثبیت‌شده با سیمان و زئولیت با استفاده از آزمایش برش ساده مونوتونیک

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 دانشکده مهندسی عمران، دانشگاه سمنان

2 پژوهشکده مهندسی ژئوتکنیک، پژوهشگاه بین‌المللی زلزله‌شناسی و مهندسی زلزله، تهران

چکیده

این مقاله نتایج حاصل از تحقیقات آزمایشگاهی بر روی مقاومت برشی ماسه سیمانته (Cemented Sand) و نیز تأثیر جایگزینی زئولیت به­ جای سیمان را ارائه می­ دهد. تعدادی آزمایش برش ساده مونوتونیک (Monotonic) بر روی نمونه ­های ماسه ­ای ترکیب‌شده با سیمان و نیز ماسه ترکیب‌شده با سیمان و زئولیت و در فواصل 7 و 90 روزه انجام گردید. این نمونه ­ها با درصد سیمان­ های 2، 4 و 6 درصد و همچنین با درصد جایگزینی­ های 0، 30، 45، 60 و 75 درصد زئولیت به‌جای سیمان ساخته شدند و تحت تنش­ های سربار 100، 150 و 200 کیلوپاسکال قرار گرفتند. برای دستیابی به این هدف از زئولیت معدنی، سیمان تیپ دو شاهرود و ماسه بابلسر استفاده شد. نتایج حاصله از آزمایش برش ساده مونوتونیک نشان می­ دهد که با افزایش درصد جایگزینی وزنی زئولیت به­ جای سیمان تا 30 درصد و در مدت عمل­ آوری 90 روزه، مقاومت برشی نمونه ­ها نسبت به نمونه­ های بدون زئولیت تقریباً تا 25 درصد افزایش می­ یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Evaluation of Mechanical Properties of Cement and Zeolite-Stabilized Sand using Monotonic Simple Shear Test

نویسندگان [English]

  • Iman Amiri 1
  • Abdolhosein Haddad 1
  • Yaser Jafarian 2
1 Faculty of Civil Engineering, Semnan University, Semnan, Iran
2 International Institute of Earthquake Engineering and Seismology (IIEES)
چکیده [English]

.
Using a simple shear test, it is possible to investigate the behavior and recognition of soil resistive parameters. Cementation is one of the subsets of soil remediation that falls into the category of physical and chemical remediation that binds soil particles together and prevents the breakdown of the soil skeleton and increases shear strength (Consoli, 2009; Finn, 2002). The behavior of soil resistance parameters is investigated using simple shear tests. Shear stresses in the soil can be divided into static and dynamic (Li et al, 2016). One of the best ways to reduce cement consumption and production is to use pozzolanic materials, especially natural pozzolans, and replace them with cement. Pozzolans are widely used in the cement and concrete industry (Rahgozar et al, 2018). Micro-silica, perlite, methakaolin and zeolite are the most well-known natural pozzolans. Since the cost of producing pozzolans other than zeolite is almost high, their use would not be economical on a large scale. Zeolite mainly contains silica, and aluminum oxide, which reacts with calcium oxide and thereby increases the strength of the resulting compound. The addition of zeolite improves the spatial structure properties of the zeolite, as well as reduces the porosity of the resulting mixture (El Mir and Nehme, 2017). This paper presents the results of laboratory investigations on the shear strength of cemented sand and the effect of zeolite replacement on cement. To achieve this purpose, mineral zeolite, Shahroud cement, and Babolsar sand were used.

کلیدواژه‌ها [English]

  • Monotonic Simple Shear Test
  • Cement
  • Zeolite
  • Shear Strength
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www.shahroudcement.com
www.zeomed.ir