Retarders

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Kouhei Ibayashi - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Retarders on flow and strength development of alkali-activated fly ash/blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

  • effect of Retarders on flow and strength development of alkali activated fly ash blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

Kenta Sasaki - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Retarders on flow and strength development of alkali-activated fly ash/blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

  • effect of Retarders on flow and strength development of alkali activated fly ash blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

Kiyofumi Kurumisawa - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Retarders on flow and strength development of alkali-activated fly ash/blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

  • effect of Retarders on flow and strength development of alkali activated fly ash blast furnace slag composite
    Construction and Building Materials, 2019
    Co-Authors: Kenta Sasaki, Kiyofumi Kurumisawa, Kouhei Ibayashi
    Abstract:

    Abstract Geopolymer concrete presents a major problem regarding its practical application, in that the geopolymer paste has very short setting time. Previous studies have shown that the addition of blast furnace slag to geopolymer paste considerably shortens the setting time. Based on these findings, in the present study, setting Retarders were used to lengthen the setting time of the geopolymer paste. The objective of the present study was to identify the effect of a setting retarder on the fluidity and compressive strength of alkali-activated fly ash/blast furnace slag-based materials. It was shown that, by adding a chelator as a retarder, the setting time can be prolonged. However, the setting time was found to be dependent on the type of chelator. Similarly, the compressive strength development of the geopolymer was also found to be dependent on the type of chelator. It was clarified that the concentration of calcium and aluminum in solution during hardening changes with the addition of a chelator, and it was shown that there is a correlation between the concentrations of calcium and aluminum and the setting time.

Misrawi Misrawi - One of the best experts on this subject based on the ideXlab platform.

  • Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan. (Hal. 1-11)
    'Institut Teknologi Nasional Bandung', 2020
    Co-Authors: Trimurtiningrum Retno, Sutriono Anto, Arrowrichta Illy, Watu, Hiasintus Ertus, Misrawi Misrawi
    Abstract:

    ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely Retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarde

  • Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan
    'Institut Teknologi Nasional Bandung', 2020
    Co-Authors: Trimurtiningrum Retno, Sutriono Bantot, Arrowrichta Billy, Watu, Hiasintus Bertus, Misrawi Misrawi
    Abstract:

    ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely Retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarde

Trimurtiningrum Retno - One of the best experts on this subject based on the ideXlab platform.

  • Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan. (Hal. 1-11)
    'Institut Teknologi Nasional Bandung', 2020
    Co-Authors: Trimurtiningrum Retno, Sutriono Anto, Arrowrichta Illy, Watu, Hiasintus Ertus, Misrawi Misrawi
    Abstract:

    ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely Retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarde

  • Pengaruh Bahan Tambah Gula Pasir Terhadap Waktu Pengikatan dan Kuat Tekan
    'Institut Teknologi Nasional Bandung', 2020
    Co-Authors: Trimurtiningrum Retno, Sutriono Bantot, Arrowrichta Billy, Watu, Hiasintus Bertus, Misrawi Misrawi
    Abstract:

    ABSTRAKDalam pelaksanaan pembangunan konstruksi beton, seringkali ditemui beberapa kendala, seperti lokasi batching plan yang berbeda dengan lokasi proyek serta tingginya temperatur saat pengecoran, sehingga dapat mempercepat waktu pengikatan beton. Untuk mencegah waktu pengikatan lebih awal, diperlukan bahan tambah kimia yang dapat memperlambat waktu pengikatan yaitu retarder. Akan tetapi, bahan tambah kimia mempunyai harga yang relatif tinggi. Oleh karena itu, pada penelitian ini digunakan gula sebagai bahan tambah alternatif, karena gula merupakan salah satu penyusun dalam komposisi retarder serta mempunyai harga yang cukup ekonomis. Persentase gula pasir yang digunakan bervariasi, yaitu 0% (sebagai benda uji kontrol); 0,03%; 0,05% dan 0,1%. Hasil pengujian menunjukkan waktu pengikatan terlama diperoleh campuran dengan persentase gula sebanyak 0,1% dengan waktu ikat awal 157 menit dan waktu ikat akhir 258 menit, sedangkan hasil pengujian kuat tekan maksimum sebesar 225,38 kg/cm2 diperoleh campuran dengan persentase gula sebanyak 0,05%.Kata kunci: waktu pengikatan, gula, kuat tekan, retarderABSTRACTIn concrete construction process, several obstacles are often to be encountered such as the location of the batching plan that is different from the project location, as well as the high temperature while casting causes the acceleration of concrete setting time. To prevent earlier setting time, chemical admixture which can slow down the setting time is needed, namely Retarders. However, chemical admixtures have relatively high prices. Therefore, in this study, sugar was used as an alternative ingredient, because sugar is one of the retarder’s composition and has relatively economical price. The percentages of sugar were varied, which are 0% (as a control specimen); 0.03%; 0.05% and 0.1%. The test results showed that the longest setting time is obtained by mixture with 0.1% of sugar, with the initial setting time 157 minutes and the final setting time 258 minutes, while the maximum compressive strength test results are 225,38 kg/cm2 obtained by a mixture with 0,05% of sugar.Keywords: setting time, sugar, compressive strength, retarde

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