-
Q2：
At present, how about the price level of basalt fiber material? The economic applicability analysis of main application fields and application methods is carried out.
Guidance price
At present, the market guidance price provided by CHTS collaborative innovation community of basalt fiber pavement industry is 19,500 yuan/ton, which is slightly higher. The main reason is that the production scale is small and the comprehensive production cost is high. Provided the production technology is further improved, and the application in the similar highway engineering field is further expanded and the production scale is enlarged, then the production cost can be reduced and sale price can be lower approximately.
Application fields and methods
Economic applicability analysis
01 Chopped basalt fiber
Taking chopped basalt fiber reinforced asphalt concrete pavement as an example
The increase of fiber cost in producing 1T basalt fiber asphalt mixture is about 70 yuan, while the price of 1T SBS modified asphalt mixture is about 470 yuan, and the increased cost only takes up about 15%
The new material and new technology of high-performance basalt fiber asphalt mixture is mainly applied in new construction, reconstruction and maintenance projects. The initial cost of new pavement materials is slightly increased, but it can significantly improve the pavement quality, greatly extend the service life, extend the maintenance cycle and save maintenance cost. Compared with ordinary asphalt concrete material, the maintenance cycle of basalt fiber asphalt mixture material can be extended from 3 to 5 years to 6 to 8 years, and the number of maintenance can be reduced from 3 to 2 times.
02 Continuous basalt fiber reinforced bar (rebar)
Basalt fiber rebar is a new type of composite material made of basalt fiber as reinforced material, synthetic resin (such as unsaturated polyester resin, epoxy resin, vinyl resin) as matrix material and appropriate amount of auxiliary agent (such as cross-linking monomer, initiator, accelerator, alteration agent, flame retardant, inhibitor, filler, pigment, etc.) through pultrusion process and special surface treatment. It has advantages such as corrosion resistance, high strength, and light weight, resistance to electromagnetics and so on.
Physical and mechanical properties comparison among fiber rebar, steel bar and copper barItem
basalt fiber rebar
steel bar
copper bar
tensile strength
≥600
≥500
≥430
yield strength
≥600
≥300
≥340
elastic modulus
≥40
≥200
≥110
Thermal expansion coefficient - transverse
21-22
11.7
17.6
Thermal expansion coefficient - longitudinal
9-12
11.7
17.6
density
1.9-2.1
7.8-7.9
8.9
Elongation
≥1.8
≥18
—
alkali resistance
≥75
poor
poor
magnetic susceptibility
≤5×10的负7次方
higher
higher
The strength of the fiber rebar is 4 times that of the steel bar, and the weight is 1/4 only. Due to the high strength of the fiber rebar, small diameter fiber rebars can be used to replace large diameter steel bars.
Tests show that 6 mm diameter fiber rebar can replace 10 mm diameter steel bar, 7 mm diameter fiber rebar can replace 12 mm diameter steel bar, 8 mm diameter fiber rebar can replace 14 mm diameter steel bar.
Economic comparison between fiber rebar and steel bar
calculation based on unit price of fiber rebar 37000 yuan/ton and steel bar 3500 yuan/tonItem
type of bar
comparison
mm
diameterfiber rebar
6
7
8
steel bar
10
12
14
Mpa
Strengthfiber rebar
1300
1100
1100
steel bar
335
335
335
Design breaking strength
fiber rebar
36738
42312
55264
steel bar
26297
37868
51543
weight per meter
fiber rebar
59.63
51.16
106
steel bar
620.15
893.02
1215.49
price per meter
fiber rebar
2.21
3
3.92
steel bar
2.17
3.12
4.25
direct economic effect
fiber rebar V.S. steel bar
1.8% higher
cost reduce 3.9%
cost reduce 7.53%
indirect economic effect
1.e steel bars need to be welded, causing at least 6% loss, while basalt fiber rebars can be produced according to the required length without welding
2. The labor intensity of laying of steel bar is higher than that of basalt fiber rebar, which can save time and labor cost.
3.Basalt fiber rebars can improve the durability of bridges, prolong the service life and maintenance cycle, thus indirectly save the maintenance cost.Application case
1. Jilin Nentan Expressway Tando to blackwater section DNZT01 bridge deck pavement, , it will take about 15 people and 5 days to complete the construction if the steel bar is used, and it took 10 people and 2 days only while using basalt fiber rebar.
2.ber rebar and basalt fiber concrete are used for bridge deck in five bridges of the Changchun ring expressway. The cracks of the bridge deck were reduced by 30% compared with that of the ordinary concrete bridge deck during the same period of construction, and no maintenance was carried out within 4 years after the completion of construction. - Back：Q&A十问十答玄武岩纤维系列（三）
- Next：Q&A十问十答玄武岩纤维系列（一）
Q&A十问十答玄武岩纤维系列（二）
Source： Time：2018-09-11
