PCB cement 30

Civil mixed Portland cement products PCB 30, MC25 Long Son help increase the flexibility of mortar, enhance waterproofing and anti-erosion properties against the environment, increase sustainability over time, and are very suitable for climate. tropical climate of Vietnam
Advantages of mixed Portland cement Civil PCB 30, MC25 Long Son. • Cement quality is always stable. In particular, cement strength always has a large residual grade, saving the amount of cement used.

Long Son Cement PCB 30, MC25 has high fineness, helping the strength develop early. At the same time, it has a high water retention ability that helps increase the flexibility of concrete and mortar, making the finishing process easier, without causing cracks in the plaster layer of the project.
The content of free lime and MgO in cement is low so there is no volume expansion after construction. Construction mortar products using Long Son cement will not have wall cracks when put into use. The total alkaline R2O content in cement is very low < 0.6%, so it eliminates the cause of corrosion & destruction of concrete structures and walls for construction projects.

Specifications:

TT	Technical indicators	Unit	Typical results	TCVN 6260:2009 PCB 30 specified
01	Độ mịn (Fineness)
	Bể mặt riêng (Specific surface)	cm²/g	3550	Min. 2800
	Lượng sót sàng 0.09mm (0.09mm residue)	%	0.8	Max. 10
02	Độ ổn định thể tích (Soundness)	mm	1.45	Max. 10
02	Le Chatelier test (Le Chaterlier)	mm	1.45	Max. 10
03	Lượng nước tiêu chuẩn (Standard Consistence)	%	28.2	–
04	Thời gian đông kết (Setting time)
	Bắt đầu (Initial set)	min (phút)	130	Min. 45 min
	Kết thúc (Final set)	Min (phút)	170	Max. 420 min
05	Cường độ chịu nén (Compressive strength)
	03 ngày (03 days)	N/mm²	20	Min. 14
	28 ngày (28 days)	N/mm²	37	Min. 30
06	Magiê ôxit- MgO trong xi măng	%	0.81	–
06	(Magnesium oxide – MgO in cement )	%	0.81	–
07	Hàm lượng SO₃ (S0₃ content)	%	1.90	Max. 3.5
08	Vôi tự do (Free-CaO)	%	0.57