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Perubahan kekuatan mampatan konkrit muda terhadap amplitud relatif gelombang ultrasonik
Kamarudin Mohd Yusof1, Mohammad Fauzi Bahari2.
Grade 20 and 30 of young concrete paste with water-cement ratios 0.5 and 0.6 have been studied using ultrasonic wave. The young concrete paste ages between one day and 28 days have been tested with an ultrasonic combined method. Relative amplitude of pressure wave, amplitude A and velocity Vp of the ultrasonic wave parameters have been measured for the compressive strength of the young concrete. Moisture content of the young concrete paste was also been studied to determine its effect on the concrete paste parameters in relation to the compressive strength. The relative amplitude the pressure wave amplitude A and the pressure wave velocity of the ultrasonic wave showed clearly that the parameters varied with the change of the compressive strength. However the effect of moisture on these parameters are also large and therefore the effect of moisture on the measurement should be taken into account.
Konkrit muda bergred 20 dan 30 dengan nisbah air-simen 0.5 dan 0.6 telah dikaji dengan menggunakan gelombang ultrasonik. Konkrit muda berumur antara 1 hari hingga 28 hari telah diuji dengan menggunakan Kaedah Gabungan Ultrasonik. Parameter-parameter amplitud relatif $\beta$,
amplitud gelombang tekanan A dan halaju Vp daripada gelombang ultrasonik telah diukur terhadap kekuatan mampatan konkrit muda berkenaan. Kandungan lembapan yang terdapat dalam konkrit muda turut diukur dan dikaji untuk menentukan kesannya ke atas hubungan parameter-parameter ini dengan kekuatan mampatan. Didapati amplitud relatif $\beta$, amplitud tekanan A dan halaju tekanan gelombang ultrasonik menunjukkan perubahan yang jelas dengan perubahan kekuatan mampatan. Walau bagaimanapun kesan kandungan lembapan terhadap parameter-parameter ini juga besar. Oleh itu kesan kelembapan ini perlu diambil kira dalam pengukuran ini.
Affiliation:
- Not Indicated, Not Indicated
- Not Indicated, Not Indicated
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