Properties of insulating building units suitable to Iraqi Environment

مقدم أطروحة جامعية

Ali, Amir Abbas

مشرف أطروحة جامعية

Khalil, Wasan Ismail
al-Mashhadani, Shakir Ahmad Salih

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم هندسة البناء و الإنشاءات

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2013

الملخص الإنجليزي

Thermal insulated walls are principal member of thermal insulation system in buildings.

The development of insulation performance of walls can be achieved by numerous methods; one of these methods is the construction of the wall by insulation masonry units.

In this thesis, the insulation performance, represented by overall heat transfer coef^cient (U-value), of the masonry units was developed by using different strategies: reduced unit's material density, ad^stments in unit geometry and inserted different types of insulation Ellers into unit's cavities.

The work includes the study of the properties of two types of common masonry units: concrete masonry units CMUs and clay masonry units.

Four types of no-slump concrete were used to produce CMUs: normal weight aggregate concrete, semi-lightweight concrete, no-fines concrete and lightweight aggregate concrete.

Each concrete type was used for producing three types of hollow concrete blocks differ in cavities arrangements.

In addition, the work includes production of two types of insulation concrete: polystyrene aggregate concrete and sawdust aggregate concrete.

The produced CMUs and two types of clay units, hollow clay brick and hollow clay block, were studied in four cases: empty cavities, cavities filled by polystyrene concrete, polyurethane foam and sawdust concrete.

Finally, the effect of two types of mortar: normal weight and lightweight was studied.

The results show that the oven dried density ranges between 1664.2-2141.6 kg/m3 for concretes used in production CMUs, between 697.9-468.8 kg/m3 for insulation concretes and between 1629-2135.5 kg/m3 for mortars.

The following properties were reported for CMUs: compressive strength between 2.55-12.7 N/mm2, absorption ranges between 3.6%-9.86% and overall heat transfer coef^cient ranges between 0.85-4.45 W/m2.K.

The overall heat transfer coef^cient for clay units ranges between 0.42-1.32 W/m2.K.

The following observations, related to thermal insulation, were reported: • The reduction in concrete density by 22% leads to reduction in U-value by 24%-41%.

• The changes in units' geometries lead to reduction in U-value by 35%-50% for empty units and by 10%-15% for filled units.

• The using of insulation Ellers leads to reduction in U-value by 5%-72%.

• The most effective method to enhance insulation performance of masonry units is using insulation Ellers into units' cavities.

In Iraq, the climate and other special circumstances make the application of thermal insulation system in buildings a pressing necessity; and using insulating building units will contribute in reduction of energy consumption, which leads to economical and ecological benefits.

التخصصات الرئيسية

العلوم الهندسية والتكنولوجية (متداخلة التخصصات)

الموضوعات

• مواد البناء
• التوصيل الحراري
• العراق

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-417525