Lightweight

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  • Topic: Concrete, Compressive strength, Physical compression
  • Pages : 29 (6824 words )
  • Download(s) : 51
  • Published : May 21, 2013
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1 STUDY OF LIGHTWEIGHT CONCRETE BEHAVIOUR

Lightweight concrete can be defined as a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional qualities such as nailbility and lessened the dead weight. It is lighter than the conventional concrete. The use of lightweight concrete has been widely spread across countries such as USA, United Kingdom and Sweden. The main specialties of lightweight concrete are its low density and thermal conductivity. Its advantages are that there is a reduction of dead load, faster building rates in construction and lower haulage and handling costs. Lightweight concrete maintains its large voids and not forming laitance layers or cement films when placed on the wall. This research was based on the performance of aerated lightweight concrete. However, sufficient water cement ratio is vital to produce adequate cohesion between cement and water. Insufficient water can cause lack of cohesion between particles, thus loss in strength of concrete. Likewise too much water can cause cement to run off aggreagate to form laitance layers, subsequently weakens in strength. Therefore, this fundamental research report is prepared to show activities and progress of the lightweight concrete. Focused were on the performance of aerated lightweight concrete such as compressive strength tests, water absorption and density and supplementary tests and comparisons made with other types of lightweight concrete.

Key researchers: Hjh Kamsiah Mohd.Ismail(Head) Mohamad Shazli Fathi Norpadzlihatun bte Manaf

E-mail :

Kamsiah@citycampus.utm.my

Tel No : 03-26154397 Vot No : 71908

ii KAJIAN TERHADAP KELAKUAN KONKRIT RINGAN

Konkrit ringan ditakrifkan sebagai konkrit yang dicampur demean agen ‘pengembang’ di mana pertambahan isipadu campuran berlaku dan memberi kualiti tambah bahan seperti pengikatan kuat dan ringan antara zarah-zarah simen dan batu baur. Konkrit ini adalah ringan dari konkrit biasa dan penggunaannya berleluasa di Negaranegara Amerika, United Kingdom and Sweden. Ciri utama konkrit ringan ini ialah ketumpatan dan pengaliran haba yang rendah. Kebaikan bahan di mana pengurangan berat bahan amat ketara, justru pembinaan lebih mudah dan seterusnya pengurangan perbelanjaan dari segi pengangkutan untuk pembinaan. Konkrit ringan mengekalkan liang dan tidak mengakibatkan pembentukan lapisan ‘laitance’ layers atau filem simen apabila di pasang di dinding. Penyelidikan ini berasaskan kelakuan konkrit ringan berliang udara. Walaubagaimanapun, nisbah air simen mencukupi penting untuk menghasilkan lekatan antara simen dan air yang baik. Kekurangan air boleh menyebabkan ikatan di antara zarah-zarah lemah, justru hilang kekuatan konkrit tersebut. Begitu juga sebaliknya, jika nisbah air tinggi akan menyebabkan simen tidak dapat mengikat batu-baur sepenuhnya untuk pembentukan lapisan ‘laitance’ seterusnya melemahkan kekuatan konkrit. Oleh yang demikian, laporan penyelidikan asas ini hanya menunjukkan aktiviti dan progres dalam pembentukan konkrit ringan. Kelakuan konkrit ringan seperti kekuatan mampatan, penyerapan air, ketumpatan dan ujian tambahan telah dijalankan dan perbandingan telah dibuat dengan bahan binaan konkrit ringan lain. Penyelidik: Hjh Kamsiah Mohd.Ismail(Ketua) Mohamad Shazli Fathi Norpadzlihatun bte Manaf

E-mail :

Kamsiah@citycampus.utm.my

Tel No : 03-26154397 Vot No : 71908

CONTENTS ABSTRACT I

CHAPTER 1 : 1.1 1.2

INTRODUCTION Preface Research activity

1 1 1

CHAPTER 2 : 2.1 2.2 2.3 2.4

LITERATURE REVIEW OF LIGHTWEIGHT CONCRETE Introduction Types of Lightweight Concrete Advantages and disadvantages of lightweight concrete Application of lightweight concrete 3 4 8 9

CHAPTER 3 : 3.1 3.2 3.3 3.4

METHODOLOGY Testing program of lightweight concrete Compressive strength Water absorption Density 10 10 11 11

CHAPTER 4 : 4.1 4.2 4.3 4.4 4.5

RESULTS AND DISCUSSIONS Introduction Strength and density...
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