The Effect of Admixtures on Concrete Properties

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

In this study super plasticizers admixtures were used for the three grades ofconcrete 15, 25 and 40N/mm2 to improve the properties of fresh and hardenconcrete in hot weather to achieve these properties in the summer season ofSudan:− Increase the workability− Increase the compressive strength by adoption super plasticizersadmixtures which increase the workability and hence the strength isincreased through the reduction of water content.− Reduce the cement content and hence cost saving.The experimental work was divided into two phases:1. Tests on basic materials (cement, aggregate, sand, water) and the effect ofrecommended dose of admixture on the properties of fresh and hardenedconcrete.The results of tests for the basic materials were carried to ensure thattheir results conforming to their standards and can be used.2. Concrete testing program for the three grades which contain four mixesfor each grade.− Ordinary reference mix− Same mix with admixture to increase strength− Same mix with admixture to reduce water content and henceincrease strength.− Same mix with admixture to reduce the cement content keepingsame workability and strength.The results of the second phase for the three grades indicate that admixtures canbe used to:− Increase the workability of the concrete for the three grades by:Slump from 55 to 160 for grade 15.Slump from 60 to 200 for grade 25.Slump from 60 to 160 for grade 40.− Increase the compressive strength of the three grades at 28 days by:(28 – 33)% for grade15.(32 – 55)% for grade 25.(19 – 28)% for grade 40.− Reduce the cement content by 23% compared with reference mixeswithout reducing the compressive strength and keeping same (w/c).

روابط وملفات

التعريف والنوع

رقم الوثيقة

0591b53d-a430-478d-ae8e-929fd2be5300

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1636508_1.pdf

بيانات النشر

ألقاب المؤلفين

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اللغة

English

المصدر والدورية

اسم المصدر

The Effect of Admixtures on Concrete Properties

المحتوى والصفحات

عدد الصفحات

0

إشراف وإعداد

الإشراف

محجوب عثمان

الإعداد

عبدالرحيم محمد

الاقتباسات الببليوغرافية