Environmental Engineering Reference
In-Depth Information
5.3.1.3 Explosive Property
Glycol dinitrate is a strong liquid explosive with zero oxygen balance. The reaction
of detonation can be expressed as:
CH
2
ONO
2
2CO
2
+2H
2
O+N
2
CH
2
ONO
2
As shown in the reaction, all elements of C, H, and O are involved in the
detonation. Thus, its explosive heat is 6610.72 J/g (water vapor) or 7133.72 J/g
(liquid water). The heat of formation
−ʔ
H
f
for glycol dinitrate is 283.26 kJ/mol. It is
not sensitive to shock and the characteristic height is about 20
25 cm with 2,000 g
-
falling weight. Glycol dinitrate is sensitive to
flammable in air
at normal atmosphere. In a glass tube with diameter of 4 mm, the combustion
velocity of glycol dinitrate is linearly proportional to the pressure at 14
fl
ames [
71
,
72
]. It is
fl
15
°
C in the
-
pressure range of 300
770 mmHg.
-
U ¼ A
þ
BP
Under 230 mmHg, glycol dinitrate cannot be burnt, but it is easy to be detonated.
A quite amount of glycol dinitrate would be exploded when burnt.
The lead-block value with water
filling of glycol dinitrate is 650 cm. Brisance
value is about 110 % NG. The detonation velocity is changed with loading con-
dition. The correlation between the detonation velocity of glycol dinitrate and the
loading condition is shown in Table
5.14
.
Table 5.14
Correlation between the detonation velocity of glycol dinitrate and the loading
condition
Loading condition/
method
Materials of container
Initiation approach
Detonation
velocity
(m/s)
Loading diameter
ˆ
Seamless steel tube
(wall thickness
2.5 mm)
Directly by 8# detonator
7,780
36 mm
Loading diameter
ˆ
Seamless steel tube
(wall thickness
2.5 mm)
80 g mandelic acid as booster
charge, and directly by 8#
detonator
7,960
38 mm
Loading diameter
ˆ
45 mm
Seamless steel tube
(wall thickness
2.5 mm)
80 g mandelic acid as booster
charge, and directly by 8#
detonator
8,100
ˆ
60 mm Porcelain
crucible
Open
Directly by 8# detonator
1,830
ˆ
60 mm Porcelain
crucible
Cool down to
−
70
°
C Directly by 8# detonator
7,980
