Sains Malaysiana 49(8)(2020): 1925-1934

http://dx.doi.org/10.17576/jsm-2020-4908-14

Effect of Polyacrylamide on Compression Rate of Lime Stabilized Soil

(Kesan Poliakrilamida terhadap Kadar Pemampatan Tanah Terstabil Kapur)

MINGXING GAO¹*, FEILONG YUAN¹, YANHUA XUE¹ & PENG GUAN²

¹College of Energy and Transportation Engineering, Inner Mongolia, Agricultural University

Hohhot, Inner Mongolia, 010018, China

²Hongrui Road and Bridge Engineering Science, Technology Research Institute, Hinggan League, Inner Mongolia, 137400, China

Diserahkan: 17 Disember 2019/Diterima: 21 April 2020

ABSTRACT

In order to explore the influence mechanism of polyacrylamide on the compressibility of lime-stabilized soil, polyacrylamide with different contents was added to lime-stabilized soil, and the relationship between the consolidation coefficient and the consolidation pressure was obtained through one-dimensional laboratory consolidation experiment, and samples were taken for nitrogen adsorption experiment and observation with solid microscope. The results show that the microscopic image shows that the reaction of polyacrylamide with lime will form a spatial network structure; 0.24% polyacrylamide can effectively reduce the compression of lime stabilized soil, and the porosity ratio of solidified soil can be increased by 15.4%, and the consolidation rate can be accelerated by 413.2%. The pore volume distribution shows that the addition of polyacrylamide to lime stabilized soil can reduce the mesopore volume of the solidified soil and produce ultra-large pores. At the same time, the porosity ratio of the solidified soil is increased, which is beneficial to the drainage of super-pore water in the soil, accelerate the consolidation rate of solidified soil, shortens the time of consolidation and stability of the soil.

Keywords: Consolidation coefficient; microscopic image; nitrogen adsorption; pore structure

ABSTRAK

Dalam usaha untuk mengkaji mekanisme kesan poliakrilamida terhadap kebolehmampatan tanah terstabil kapur, poliakrilamida berbeza kandungan ditambahkan kepada tanah terstabil kapur dan hubungan antara pekali penggabungan dan penyatuan tekanan diperoleh melalui uji kaji penyatuan satu dimensi dan sampel diambil untuk uji kaji penjerapan nitrogen dan pemerhatian dengan mikroskop pejal. Hasilnya, imej mikroskopik menunjukkan bahawa tindak balas poliakrilamida dengan kapur akan membentuk struktur rangkaian reruang; 0.24% poliakrilamida dapat mengurangkan pemampatan tanah terstabil kapur dengan berkesan dan keliangan tanah yang dipadatkan dapat ditingkatkan sebanyak 15.4% dan kadar penyatuan dapat dipercepat sebanyak 413.2%. Taburan isi padu liang menunjukkan bahawa penambahan poliakrilamida kepada tanah yang terstabil kapur dapat mengurangkan isi padu tanah pejal, menghasilkan liang yang sangat besar dan meningkatkan nisbah keliangan tanah yang dipadatkan. Kadar penyatuan tanah yang dipadatkan memendekkan masa penyatuan dan kestabilan tanah.

Kata kunci: Imej mikroskopik; pekali penyatuan; penjerapan nitrogen; struktur liang

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*Pengarang untuk surat-menyurat; email: gaomingxing_2000@imau.edu.cn